Hi Redbaron
where in Your pin is the Ball-Index-Relay --- in the cabinet ? And where is the Player-Unit --- in the Backbox ?
If so - there is a Jones-Plug in the connection - I have taken HowardR 's JPG and added the drawing of Plugs. The ipdb-schematics is not so good - I do not know if I am allowed to read "95-4 Grey-White". Greetings Rolf