Just took the cover off the pool at the new house we just bought, to do some testing and get equipment set up. I noticed that the return didn't have an eyeball attachment nor was one laying around in the garage where they left some supplies. When I buy a new one, how hard/easy is it to install? Also, the skimmer plate that covers the opening in the pool during the winter is still on, of course, and I have no idea how to remove it and/or put the Weir door in. The cover looks and feels like a rubber or silicone piece. Any guidance would be fantastic!