I can't remember which wires I connect to my heater. It's a kenmore model# 11063012101
Please help!

Two of the wires are going to have a slightly larger terminal on them these go to the element. One of them is going to come directly from the high limit thermostat on the front left of the heater housing. These wires are usually of a higher gage and are generally red. Your wiring diagram will be in your control panel to be sure.