windows like that? Well, if the cameras arnt against him, just sneak and open them... kill the camera system, something like that.
If there is a key, he gets it, or otherwise he picks it, or jars it open with a wedge/lift. Really, it sounds like sneak and mechanically moving something. Now if it was lasers and other things, it would work differently, but the proccess sounds straight forward.
as of the 2nd of Nov. has 6 weeks for a broken collar bone to heal and types 1 handed and slowly