Help Needed - replacing bolt catch lever

Hello Group,

I am trying to replace the bolt catch lever on a CRB. Mine broke, no idea when or how but the skinner side snapped off. I just noticed it one day in the safe, called KRISS, sent a picture and they promptly sent me a new lever for free. My problem is once I removed the bolt lock block assembly, i can not figure out how to remove the pin (or screw) holding the lever in (top side is flush with the assembly housing and the bottom in sunk inside). I tried looking it up but haven't seen anyone mention it and the armorer manual doesn't go into that level of detail. My guess is a punch & hammer but thought I better ask first. Thanks in a advance to anyone who knows.