I'm installing an SDS EM-2 into my car. It's a fuel only computer and does not have the fuel pump relay option. I'm keeping the factory computer in place to run the ignition. None of the factory sensors(BAC, ACV, AFM, etc...) are plugged into the factory harness. The harness is still in the car.

Do I need to wire the fuel pump to the battery with an on/off switch(via a relay) or is the fuel pump still going to come on since the CAS is still working with the ignition?