Can put a torch on the back of the saddle as a skin: open inventory, select the torch, drag it on the megatherium saddle that is in the PLAYER's inventory, equip the saddle to your megatherium and enjoy the light !

Don't need to equip your torch for the darkness anymore. Equip any weapon on the back of your megatherium and still have some light now!

But the torch stills losing durability.

Hopefully that can help you!

ps: I don't speak English very well sorry if there is a few mistakes...