if the X relay is powering, see if the hole switches are gapped too small and vibration is closing one to power X

thumping the playfield around the holes is another test

looks like it's on the bottom board in the relay bank in front of the transformer.

https://www.ipdb.org/showpic.pl?id=2288&picno=66175

a sequence of stuff happens, some of which is:

1] hole switch closes and powers X relay
2] X relay switch closes and power A relay - A is the spin delay relay
3] A relay switch powers the G relay - G is the hole and spin relay
4] G relay switch powers the hole kick coils

there's score motor switches in the circuits controlling when some of that stuff happens, but the simplest thing to check first is if the hole switches are closing when they shouldn't.

if the game is spinning without the X relay powering, look at the switch on the X relay with the RED-WH and YEL+BLK wires ... that's the one powering the A relay coil.

the Y relay releases when score motor 2B switch opens.

the score motor should turn on when Y powers. Sounds like it isn't. There's two switches in the circuit:

Y relay switch : red-yel and blk-yel wires - N.O.
top center rollover switch : blk-yel and red-wh wires - N.C.

note there's at least two switches on the top center rollover. One powers the Y relay when the rollover is down, the other is in the circuit to turn on the score motor when the rollover is up.