Ok have started on the wiring, decided to use a 15way ribbon cable rather that individual wires, just thought it would be easier and tidier, have used a 15way dsub socket and plug on one end so I can just unplug the units if I don’t want to use them.
Have also used a ribbon cable for note acceptor which uses a 16 pin idc plug again for ease of use rather than individual wires but then joined it to the 15 pin via choc block at this moment but will change to some sort of 5 way plug/socket just so the note acceptor can be unplugged separately.