Welcome !!
Wiring is all heat rated and oils and solvent rated. If you're concerned about heat, I'd check your wires rating (should be marked on the wire cover every few inches), and if want to you could just get some that is unrated from what you have currently. Keep it tight to the block and DO NOT secure it with plastic zip ties. Again you can get stainless steel zip ties... Or use a properly sized Adel clamps. I'd try to run it on the pan rail.
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