On my '97 I took off the left-rear light assembly and found the hot wire that runs to the stop lamp. I tapped into that wire with a 16ga wire. Another 16ga ground wire was connected to the body sheet metal with a ring lug, sheet metal screw and star washer. I ran those two wires through a hole punched through the vertical sheet metal column at the left-rear corner of the bed, up through that column to a square access hole at the top-inside of the bed. The hot wire from the stop lamp circuit was run through a 5 amp fuse holder and the two wires run together up to the top corner of the topper and along the top of the rear window panel to the new high-mounted stop lamp assembly.