He means the dangly bit

Ah! I understand now. No, there is no metal near the back of the sled. It butts up pretty tightly against a plastic defroster vent that we had to modify to fit the sled in.

...if you've got this problem...

I was aware of that problem before I installed the sled, and I tested it by pulling quite vigorously on the wires before it went into the car. I don't think there any loose wires... but it is impossible to tell for sure without removing the sled and that would definitely be a last resort.

tanstaafl.