Perhaps inevitably, Scott has a better copy of the second image (at least):
https://up-ship.com/blog/?p=24726
The 1957 Convair document Characteristics of Tactical, Strategic and Research Missiles gives three warheads for the 'B-58 Pod': one of 2,800 lb, one of 7,000 lb, and one of 20,000 lb.

https://apps.dtic.mil/sti/citations/AD0388603
Those correspond fairly naturally to the second-generation thermonuclear W27, W39, and W36 warheads respectively. Which I identified back in 2014, but we can do better.

However, we know that the MB-1 (and presumably the corresponding MA-1) pods carried the W39. Scaling pixels implies that the other two carried proportionately larger warheads:
  • MA-2 & MB-2 - Approximately 38" x 120" - perhaps corresponding to the W46, which is known to have been planned for the B-58.
  • MA-3 & MB-3 - Approximately 49" x 140" - perhaps corresponding to the W41.
My guess is that as development progressed, it was seen as inefficient to use the B-58 to deliver a single Class D weapon, and the W27 warhead was dropped. The MB-1 with a W39 was the initial service model, and it was expected to replace this with the -2 and -3 pods carrying higher-yield W46 and W41 warheads.

With limited service of the B-58, and the fuel leak issues, none of the other pods were developed. The BLU-2 Two-Component Pod did, however, use the W53, which evolved from the original W46.
 
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They mentioned here,my dear Scott and his work,

View: https://www.youtube.com/watch?v=jbGzuyPvBbo

With no offense at all,they were not clever enough,the Convair 58-9 had to
build,becuase many reasons,first it was depended on a successful design already
entered product and proved a good performance,second no need to make
studying for construction design,third that was a priority to surprise the world
by made at least two prototypes,and it was not cost much,fourth there was a
big possibility to issue a large versions,my speculation is; Model-58-10 with a
capacity of accommodation 80 to 90 passenger.

These may the companies contected Convair and USA got a precedence in
this field ?!.

PLEASE,no argue about that in this topic,it's my personal opinion.
 
Report on missile launch configurarion for B58. Attached is the report and some of copies of the imagaes contained in it. Another report will follow.
 

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Another study.
 

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Thanks @RAP for the two documents. I'm adding a few more of them so that all TOWN HALL documents are at the same place.
- Drats, I've just realized a few of them are identical, except for the name.
 

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From this report.
 

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I wonder why the B-58 wasn't a tailed delta like the A-4 Skyhawk? Because if it had had a tailplane the B-58 could've had flaps on its' wings trailing edge meaning lower landing and takeoff speeds along with a lower angle-of-attack meaning better pilot visibility from the cockpit. This would've meant far fewer landing and takeoff crashes with IIRC 30% of B-58 lost in crashes before the bomber was retired.​

use the W53, which evolved from the original W46.

The W-53 was basically a W-46 with a new primary (Meaning they had externally identical radiation-cases).
 

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