Boxford VSL lathe motor brake wiring

[merlin]

I have finished restoring a VSL 500 lathe that came with only parts of the motor brake with it, luckily I have sourced a complete unit that I have now fitted, trouble is I'm not sure how to wire it up, the switch and motor are connected but there are 2 wires inside the main control area that are not - can anybody help me with the correct connection?
Every thing else works as it should so I just need to connect these last 2 wires, I have looked on the internet but cant locate a wiring diagram and the Boxford book from Tony at Lathes doesn't really help.

Thanks, Merlin