Bob,
the bigger one is obviously the dry-sump tank.
The lines connected to the middle ssection are the return lines from the
oil pump. The lower one is the feed line to the engine.
The second tank collects the vent lines from engine and dry sump tank. The long line leading to the rear is open.
Don't ask me why two lines on the top lead to the smaller tank.
Maybe there was just a vacant fitting...
BTW, Peter uses two engine
oil coolers.
Dominik