1) Radio stays ON when the ignition is switched OFF:
Connect the radio’s negative (black) lead to the vehicle chassis, or directly to the battery’s negative terminal. Connect the radio’s positive (red) lead via the 2 Amp fuse to the battery’s positive terminal. Alternatively, the positive lead could be connected at the fuse box at a point that has DC Power continuously available (preferably the battery side of the ignition switch) via the 2 Amp fuse.
2) Radio turns OFF with the ignition switch:
Connect the radio’s negative (black) lead to the vehicle’s chassis, or directly to the battery’s negative terminal. The radio’s positive (red) lead should connect to an accessory point in the vehicle’s fuse box via the 2 Amp fuse.