Help with Oil Leaks-Deep Sump, Oil Leaks Options

[Stark 01]

Hello everyone, I'm a first-time poster here and an owner of my first 914, which is a converted race car (done in the 90s). I'm going through the car to get it ready for racing next year and decided to see if I can minimize some of the oil leaks because it is leaking a little too much for my comfort.

I need information on the deep oil sump that came on the car, I think it is a SCAT design. I saw oil leaking from the bottom round plate, and oil coming through the mounting screws in addition to the edges of that round plate that holds the drain plug.

-I removed the round plate/drain plug and gasket. I was expecting to see the pickup and screen when I removed that but what I found is in the picture. It can spin in place but doesn't come off. The oil gets in between this plate and the sump housing, and I think that's where the oil is getting out.

-How do I remove this part to look at the pickup and screen? Should there be another gasket between this piece and the sump? What is it's purpose??

I tried searching the internet, including this site and can't find a DIY article (but I admit my search skills suck)

-Can anyone take a look at the picture and give me advice on what I need to do?
The 914 is a 1973 Body with I believe to be a 1.8L