Hi guys. I have a corsa opc /Vauxhall vxr2013. And I installed a pumpkin headunit, focal performance 165 v1 last editiom, an nvx vad 11005 amp. And 4 gauge wiring kit.
Power wires and RCAs run on different sides of the car,
For ground to the amp I sanded the body beneath the rear seatbelt bolt...