Need help figuring out how to install a faceless (ie, single-sided) deadbolt in a metal, foam-cored entry door. My boyfriend's house was burgled by the thieves kicking in his door. Door frame has been replaced, new traditional deadbolt and doorknob have been installed. However, he has a second "faceless" deadbolt that cannot be seen from outside. We have a schlage B80 single sided deadbolt, but there is nothing to screw the little metal piece that secures the actual deadbolt. Kwikset and Baldwin single sided deadbolts are basically the same -- the guy who repaired the doorframe tossed all the old locks before I had a chance to ask him to keep the faceless one. So I cannot refer back to that one to see how it was installed. This is a condo situation, so we cannot simply drill a hole on the other side of the door and install a regular deadbolt. Basically, how trying to figure how how to secure the actual deadblot so when you turn the knob, it stays in the door. The hole is too big for the metal piece that fits inside the knob that typically would hold the deadbolt in place. I know there is a way to attach it, as there was one in there before - I just can't figure out how to do it. Again, is a metal, foam cored door, not a good wooden one with wood core. Cannot replace the door as is a condo and rules will not allow for new door.