How to protect the optic fiber inlet for modem

The optical fiber modem that was installed by my ISP has a very delicate looking optic fiber that I’m having a bit of trouble trying to place somewhere that it doesn’t get damaged as the ISP worker told be to careful about it
So how should i protect that cable such that it suffers no damage

Best to leave it in situ - if you want your router elsewhere try to get a longer ethernet cable. Best practice is for the ISP to mount the ONT (modem) to the wall so it doesn’t get moved around too much.

Just as @root has said its best practice if your ISP will properly be to mount your router but thats not the case you need to call them up and inform them timely so that no chance for damage may come to that cable