Yeah I've just seen that. I would guess you can as the wire will be underneath the barrel and you can just push it around and move the PEQ. I imagine it will be like any other battery box PEQ you can buy but I don't know. Maybe there will be a review of it somewhere that mentions it. If it's where the battery goes they should mention it.
Oh that was stupid of me it's not wired to the battery box...? I realised I've wrote mention(s) twice as well, that's annoying. Anyway yeah you should be able to move it. I don't see why not.