I would assume you have XM-1801 which from what I've read pretty much the same thing as my XM-200's just smaller. I've capped 2 of them and it's a breeze. Of course, I'm having some issues with 1 of them. The other looks great.
I thought the chassis were bit harder to remove than the other monitors I've worked on. I'm pretty new at this so I have limited experience. If I can do it, anyone can.