I am brand new pool owner. I was trying to vacuum my pool out for the first time and realized there was no suction from the skimmer. The men at pinch a penny said it looked like there was no valve to open the skimmer suction. Can someone please advise by the pictures below if I am just missing something? I have worked on my mom's pool since I was a kid and have never not seen a pool without the black valve. Is it somewhere else? Thanks!