Pictures of Relay Mounted on Door.  Note  relay mounting locations vary slightly.  Some mount a little higher (nearer the small lamps).  Also, the relay styles differ slightly.  However, they all have one thing in common.  One wire from the relay goes to the coil under the coin mechanism.

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Closeup of Relay Mounted on Front Door. Notice the white wire with red stripe,

it goes to the coil behind the coin mechanism

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Front Door with Relay Shown.  Some relays are mounted just under the Lamps.