someone cut my ecu clips and i want to remove the entire wire how do i remove the wire and what is it call cause its not off the motor wire

 

The harness that connects to the ECU is the main wire harness, it connects to the engine wire harness in the engine bay near the battery and passenger-side shock tower.

The main goes clear across the dash (inside the dash) and connects to the fuse box, main relays, etc on the other side. Looks like a bit of work to remove.