Follow the instruction to connect the positive terminal from the starting battery to stud A on the ACR and, with a second wire, the input stud 2 on the battery switch. Similarly, connect the positive terminal from the house battery to ACR stud B and switch input stud 1. Also, connect the engine and accessories switch panel to output studs 2 and 1, respectively, on the battery switch. Install fuses in the positive connections to the ACR and the switch panel. Connect the negative terminals of both batteries to a common bus bar. Connect the engine’s negative cable directly to the negative terminal of the starting battery. Connect the accessory switch panel and the terminal marked “GROUND” on the ACR to the common negative bus bar. Install a fuse in the ACR ground wire. Make sure all terminal connections are tightened properly, and snap the ACR cover in place when finished.