Use green ridge glue, industrial grade, for high-speed cars, Taobao has links. Glue a few hooks (wood blocks), and it is no problem to bear more than 100kg. Elastic bonding, lasting without degumming. It is also very convenient to dismantle it in the future, just use a utility knife. Environmental protection is an additional item, which is safe and convenient to use.
Also, toothpaste is for fun.