Whats the other part for at the bottom of the picture? TB High Volume Oil PumpCT70 ATC70 Z50 Vintage K0-81 - TB Parts - Z50 K0-78 - TBW0225-6V - TBolt USA, LLC
I watched a video guide on youtube on this install and this wasn't covered. Any other guide I come across doesn't mention it either.
Also the pump I received had a female end and wasn't compatible since both had the same slotted ends. I opened up the old pump and swapped out the little part so the new pump had the male end to fit into the slotted part and then being able to turn properly.