Run a new piece of wire from the relay feed to fuel pump.....
You can also follow the wire back from the fuel pump towards the relay, this will be intersected by the immobiliser , you could just simply cut the intersection out and make good the oe wire.....
If you run a new wire or patch the oe, it's a good idea to run the wire through a switch hidden in the car, that way you can immobilise the car by flicking the switch when you want to...