Hey Ryan,
If you do a web search you will see what I saw. Consistently, there is an extra hole that yours doesn't have. Some with welting. Some with out welting. Some with just rivets. I looked at MBs, GPWs, 2As, 3As, and M38s. There weren't many photographs displaying this area, but when they did, it shows the hole. I wish I were at home to see what I have. Now I'm curious.
Tim