CabBl1

Hi there I've fitted a 1.8 zetec out of a 96 escort is into my 85 mk3 escy cab,its
90% wired in but I'm having a problem finding which wire sends a signal to
The fuel pump to tell it to run once the engine has started.
As it stands the fuel pump primes on the original wiring when you turn the
Ignition on,the relay used to take a signal from the coil to tell it to run
Continuously, it must receive the signal from the ecu now but what colour wire
And where do I connect it to? Its a SLUG ecu