I stuck the "weather resistant" one under the hood, since water does get in there Editor's note: PN 70207. I like to have one inside and one outside the Jeep, as it helps to keep down the number of wires the DSO will be putting through the firewall. It looks just like it belongs there, and I doubt Trasborg has even noticed it yet. He is talking about rewiring foglights and headlights and even the electric fan. This will come in handy for all of that.