Solder job looks fine from what I can see. I have seen far worse, and far worse that works just fine.

Sadly, your problems are likely elsewhere.

Did you say the displays did not have this problem before you incorrectly installed the plug?

I don't know williams systems well enough to guess what you could have fried by putting the plug in shifted one over. I would look at the wiring diagram and see what the "power" wire(s) were on the connector and figure out where power went that it was not supposed to go.

I don't think misconnecting data lines would matter. It is the power lines, especially the high voltage display power that may have been sent to some chips that are only made for 5 volts that I am worried are cooked.