I have the same boat. 2013 Cougar AE. Every winter before I put it away, I circulate some anti freeze into some of the pumps, including the “pump in”. Underneath the boat, there is a through hull fitting, actually facing downward (not the two facing sternward, but down), right behind the pad, and only one with that orientation. If you find that fitting and follow the hose into it, it should take you to the “pump in” pump itself. My boat is in storage, otherwise I would post a pic.I always clean my connections at the terminal block and coat them with dielectric compound at the beginning of the season.