Currently in the process of wiring my FRST OFAB loom into the old MFI Loom i have tapped the old loom up as i want to keep this

i have drilled a hole through bulk head behind battery tray so i can mount the ECU on/in glovebox

i have an old doner XR3i Loom which has the yellow and red relays/holders and wires used for the fuel pump and fuel injection my question is do i hard wire this inside the car straight off the relays to the FRST loom or do i go through the old MFI loom in the engine bay i was going to make the loom so i could disconnect it and remove if needed in the future by using male an female plug

Also iv seen that you need to disregard the Pink relay do i also have to get rid of holder or can i leave this in with the wires to use again if needed

Hopefully somone can shed some light