Mk3 facelift hole drilled in near side rear door frame - any ideas?

[edstreetka]

Curiosity finally got the better of me and I decided to remove a mysterious blanking plug only present on the near side rear door frame.

Underneath is a fairly crude hole with bear metal showing. Anyone with any bodyshop knowledge recon they know why this would have been drilled? I’ve been all over the that rear corner and can’t see any obvious signs of accident damage or repair. 
 

thanks

[edstreetka]

PDR - paintless dent removal by the looks of it. Not the best approach in my opinion, but at least the dent isn’t visible 

 

[Kawasaki kid]

As above , that is where they have gained access to the back of the panel to remove a dent.

[Kawasaki kid]

Should have added you need to touch in the bare metal around the edge of the hole to stop it rusting.

[edstreetka]

Yes, thanks for the confirmation. Will sort the bare metal and re fit the cap. 👍