I am changing the water pump impeller. I have the new impelller and pump cover on and I was trying to put the lower unit back on and the copper tube fell out of the upper housing. Does this tube just push back in the upper housing? I can see the hole where it goes but I didnt want to start pushing on it. I also am goin to have to line up the splines once i get the tube back on. I know this was probably already answered but i couldnt fnd it. I really appreciate any help with this