Here's the backbox before installation. You'll be using J133 and J137.
These connectors service three areas - the backbox, playfield and cabinet. So there are three of each.
J133, J134 and J135 are interchangeable - they have the same pinouts.
J137 and J138 are also copies.
J136 is a shorter version for the cabinet only. On this machine, the connector is missing and you can see the loose wire.