Are the circled pins the ones you're describing? They are marked as TP371 and TP471, to which did you attach the right and left, does orientation matter?
I've found Jeep cassette players with two types of fronts, one with the clock button (newer model) and ones with the DX button. However, I've found that some with the DX button have the board vertical and some have it horizontal and all that I have are different than automan2164's pictures (at least 4 versions?). The picture with the three radios has the DX ones lined up front to back. You can see similarities between the DX ones but the boards are in different orientations, and both the front DX one and the CLK one have horizontal boards. I've circled the TP371 & TP471 pins in all radios. The blue tape has the model numbers from the other side of the radios.