How to remove Openreach ONT for plastering?

[RedvGreen]

Any tips on removing this from the wall?
There appears to be enough optical fibre slack but I can’t see the mounting points to remove from wall, and I don’t fancy just ripping the modem off the wall!

 

[RedvGreen]

Are the modem and battery not on the wall mounts which you just slide up/down, then it lifts off?

Don't personally know, just throwing the idea out there

I had a go sliding but it didn’t seem to want to budge. I don’t want to use too much force...