So to clarify i need to find a cable from the opto board under the playfield from one of the drop targets and connect it to J16?? This could explain why the drop targets are not working
This means all that i need you to make is a cable for the audio?
Yes. I'm thinking just the audio cable will be needed. I can make this up easily by comparing/measuring from my Cyclone.
Is that spare plug from one of the drop target banks? Do both target banks have an opto board? Those wires(blk-yel, gry-yel) are 12v DC power for the optos.