Drain/plug on VE pump?

Trying to figure out if I’m missing a plug on the bottom of my Bosch VE pump on my pickup. There’s a threaded hole that looks like it possibly should have a plug or something? Threads look clean… trying to figure out if that’s where I have a leak coming from up front.
The hole is slightly back from the timing device and a little closer to the block. After looking at a diagram possibly this isn’t part of the pump even?