Where do I twist/turn/rotate/pull to separate the thick front part from the end part?
Best Answer
Remove the hex nut. Insert the lock. Replace the hex nut.
You'll probably need to use the key to hold the assembly while you loosen the nut, but it shouldn't be too tight. If it is for some reason, maybe use a large flat-blade screwdriver and just insert it a bit into the keyslot. In a worst-case scenario, put a wrench or pliers sideways on the lock latch and hold it that way.
Installation instructions depend on the exact model of "electronic door lock" you purchase.
Most of the low-cost/self-contained units install into a standard cylindrical-lock bore (ie, in place of the normal knobset and/or deadbolt), occasionally with another hole or two to anchor them firmly in place. That's an easy retrofit.
Commercial-type units, where the electronics is separate from the door hardware, are more complicated.
Use a flat head screwdriver to unscrew the hollow bolts to the left and right of the center shaft. It's a little strange if you've never seen it before, but those are actually barrel screws with internal and external threads.
Best Answer
Remove the hex nut. Insert the lock. Replace the hex nut.
You'll probably need to use the key to hold the assembly while you loosen the nut, but it shouldn't be too tight. If it is for some reason, maybe use a large flat-blade screwdriver and just insert it a bit into the keyslot. In a worst-case scenario, put a wrench or pliers sideways on the lock latch and hold it that way.