66 error code

OK Dave,
Looking for direction here…
My guess is that the four Mosfets that are black on one side are what we are looking for.
The two Mosfets on the other side look just slightly different than the others on that side, do you think that would be the other two?
Since forward gives the 66 error and reverse does not, start with the four black ones? or just do all six?
@Inwo

Controller2