do you have the schematic? Usually drop banks don't have a switch on them that says they are reset. You should look at the schematic or visually verify on the bank itself to see what it going on here.

In the schematic will be a whole list of switches that start the score motor. with the machine off block all of these switches with card stock or other thick paper. With all of them blocked the machine should turn on without the score motor turning.

Then remove a piece of paper and see what happens. If you remove one and the motor starts you have the first place to start looking.

If you do have the schematic post some pics here of the s and v relays and the switches that activate them

not the switches on the score motor, the switches that start it. It's in the pic you uploaded. BigSDhotStartMotorSwitches (resized).png

Every switch in that group will have a Brown-Red wire on one side of it.

curious why you had to do so much soldering? I generally only have to do things with broken solder joints

what are the other end (on the coin door) of those wires attached too?

A wise man once said "The opposite of good is better". I've done it both ways

1. Clean and adjust everything then fix the faults
2. Only fix what's broken and enjoy it

#1 seems to only be an option once you know how to do #2