Ell, that's a nice picture, but since none of the cables have any labeling on them, and Thor makes all the cables look the same, it's not of much use.
You should have:
Two jumper cables: + to + and - to -
One cable from the combined negatives to the chassis frame
All other cables go to one of the combined positives. They will trace to:
A 100 amp DC breaker for starting the generator, and
A 50 or 70 amp DC breaker for the House DC buss.
So visually you look to be OK but we can't see where your cables go.
So if neither of these breakers have been tripped, and you can here the battery disconnect latching relay work when you use the USE/STORE/Master Power switch, you may have blown the Reverse Polarity fuses in the Power Center. They are two large fuses (40 amp) that are out of line with the rest of the DC power distribution fuses.