Hole in Bottom of 914 Boge Strut Housing, Supposed to be there? Options

[frank_c]

I have a bit of a strange question. I recently removed the (I assume, original) 914 Boge struts from my '76 to install 911 struts (5-lug conversion), and noticed that the housing tubes have a 10mm hole at the bottom - right above the ball joint stud (see photo). Is this normal? The Boge 911 struts don't have this (nor do my Koni or Bilstein strut housings IIRC).

I read that some early Koni inserts used a stud at the bottom to hold the insert in place, and that a hole would need to be drilled in a Boge strut if using one of these early Konis, but that seems unlikely (btw, car had KYB inserts in it when I got it).

I'm asking because I plan to post these for sale soon, and was wondering if this is something I need to mention in the ad.



Thanks,
Frank