I would be worried to some extent if it's so tight you with a Garmin under it, but at the same time, that's an area that shouldn't ever really move either on its own, though if there was an incident and your hoods moved it could pop out, I guess.
Do you have two wires running to an external junction box or is it internal? The two external wires would probably be about 55 bucks. Not sure about the internal. Up to you if it's worth it for the piece of mind. I'd probably leave it myself.