So I have a villain ,Its my rescue boat and I'm wanting to go run but I need to lube the shaft,can't find instructions for removing the flex shaft ,there is a brass oil port on the tube ,is this a port or a cap you need to remove to oil ?ive stuck my little oil bottle on it but dosent seem like oil goes in ,any tips on this would be apreciated,I don't want to spend a lot if time on it ,the coupler is nothing like other boats ,thanks