The Sub MKIIF has 3 cables that are supplied with each unit. These cables are used to connect the REMs and the terminal block wires. So as shown:

The first picture is the REM to term wire. It has a Female end that goes from the REM (female plug) to the main unit. (FSUB-607)

Then there's the two you have that have a female and a male end these go to and from the REMs. (FSUB-608)

Then the last wire is the terminal block wiring. (FSUB-609)
These can relate to the wires below where part numbers are included.

Part number: