Here are some pics from inside my '84 EBD. All of the lamps out in your picture are powered by the black/white wire from the pin 8 of A2J1.
IMG_2933 (resized).JPG
The lamps across from the main drop target set as well as the deluxe and ball number lamps are all powered by that wire. Here I outlined the bare wire that carries the voltage to all of the non-board lamps.
cont lamp line (resized).JPG
Finally, the arrows are pointing to where you should get voltage for all of those lamps. Hopefully the one break will resolve all of your issues.
blue arrows (resized).JPG
Shawn