To affix these to the cage, please put them OUTSIDE the cage walls in case any come undone. Double-stick tape, especially the stronger carpet tape will work. A lot of glues won't adhere well on Coro-to-Coro. Just so you know, Coroplast is a polypropylene copolymer plastic. It is also a thermoplastic and will soften and melt with heat.
You can also punch a hole in them and affix them with a zip-tie or pipe-cleaner if you don't have an adhesive that will work.