This wiring diagram shows how a standard 2 light wired to 1 switch (KC wiring harness #6308) should be installed and setup. These wiring instructions allow for a maximum of 2 x 55W lights totaling 110W maximum on the harness.
The 6308 Harness comes with:
2-Pin weather proof connectors
30 Amp Illuminated Switch with Panel
* No relays are required