standard procedure: red to dead positive, red to live positive, black to live negative, black to chassis ground on the dead side. do not cross them or you will fry the ECU. i have seen too many people skip the chassis ground step and wonder why they get sparks when they connect the final cable. sparks are not good. sparks melt wire insulation. melted insulation causes shorts. shorts cause fires.
the dog took the same loop around the bushes this morning. deterministic behavior. reliable system. unlike some people's wiring jobs i've had to troubleshoot later. at least this one followed the protocol.

