the never ending story

Gents,. As usual I want to reinvent the wheel by trying to build my own sump pan under my daytona carter(long story) but I use a v11 6 gear so I can post here😉 a v sump would be the easiest way to go but a : they are expensive and I am dutch! b: no oilcooler connection and c: I need to rework it anyway to use a later v11 subframe to the carterpan. But I realy can't understand the way the oil lines from and to the oilfilter work? Dumb? Probably...but I realy could use some help🫣