Originally Posted by
Thruster763
It is a picture of a door guide and striker plates. The point of my post is the parts ringed in blue in the image by heliwrench and "pins" in pictures of incident fuselage frame (silver coloured) are NOT the locking pins or bolts, they are the door / plug guides on door / plug and guide pins on frame.
EDIT,
Just looked again and it appears that the guide pin and lock pin are combined on the mid emergency exit door. So the bolts do go intor the center of the guide pins. Sorry for the confusion.
I was second guessing myself and was correct the first time.This image of a DOOR shows the locking pins below the upper two striker plates which have the guide pin between them.
But it does look like the PLUG has bolts in a different location, possibly going into the guide pin.