The Outlet to the filter is where the pin is, closer to the front of the engine.
The Inlet from the filter is closer to the rear of the engine.
This is also where you want to connect the engine oil pressure gauge.
Take it from a daily driver of the past 10 years that connected the filter this way.
You can see photos of my setup in my link in the signature below.
I also added a bypass filter in parallel with the in and out of the full flow filter.
235s have the bypass filter connection the other way around.
