[Merc Cruzer]

This is the lock from my glove box of my 53' Merc. I was able to re-pin the door locks to match the ignition key but I can not figure how to gain access to the cylinder and pins on this lock. Any assistance would be greatly appreciated. Would it normally be matched it to the ignition key or the trunk key? I have tried YouTube but no luck. The videos seem to only show the ignition and the door locks, not the glove box door.