Depending on what your enclosure is made of, you can tape them under it, or you can enclose them in an envelope of thick toweling (which is what I've done for my geckos) and just lay them in the tank. You could also make a temporary hide from a cardboard box and hang it from the "ceiling", I guess, kind of mimicking the shipping environment. My geckos wouldn't lay on the heaters,but just cuddle up to them. I don't know what a BP will do.