I am going to install some Philips X-treme Ultinon H11 LEDS for my fog lights in a 2019 Outback. There isn't really a place to put the little rectangular black boxes so they don't move around, and certainly no place that I can zip tie them to. I was thinking of putting down some 3M double sided automotive tape and sticking them to a surface by the fog light housing. I'm curious if those little black boxes get hot? What exactly are those boxes?