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Did you get an answer on where to run thru the firewall to connect to a RVI Brake system? I have the same question on a 2023 Jeep Grand Cherokee 4xe.
thanks
This is an easy fix fellas.... You're just scared to damage your new toy.
Find an existing pass-through with enough room for your wires, or drill a hole.
When you find, or make, a location, if you're having trouble actually getting it through, DIY tools like these help a lot. Basically old screwdriver handles drilled with steel brake lines inserted. They're easy to bend if needed.