I see a green/black snipped in the first photo and a black/brown in the third.
From the manual -
There are four T.T.L. outputs, output 7 to output 10 connector HD10, to operate electronic coin acceptor inhibits.
There are five open collector outputs, output 6 and output 11 to output 14, connector HD10, to operate electromechanical AC solenoids via a triac.
One input, input 20 HD20, is configured for microswitch use.
Inputs 21 to 24 connector HD1 0 are used for electronic coin accept signals.
Inhibit inputs are used to detemine which coins are accepted by the mechanism. Coins are accepted if the inhibits are pulled low. If the line is pulled up or open circuit then coins will be rejected.
Inhibit Accept Level -0.5v or less,
Inhibit Reject Level -More than 2v or open circuit.
Coin Handling - HD10
The coin handling interface allows tor the following:
A) Four coin inputs (open collector NPN transistors).
One coin input (Microswitch).
C) Four non-payout sensors.
D) Four level detectors.
E) Four TTL inhibit outputs.
F) One high current NPN output (series 10 inhibit).
G) Four high current NPN outputs (DC solenoid drives).