On the Left Hand row of relays, starting from the front and working backwards ;

Game Interlock Relay
Over the top delay
500
"B"
"A"
Bottom lane gate 300
300 and advance

On the Right Hand row of relays, starting from the front and working backwards ;

2 coins 3 plays (absent)
3rd coin chute (absent)
2nd coin chute
coin
credit
lock
reset
delay
outhole
ball index
tilt
extra ball
bonus
player reset