There's also a pool of water to the lower right after Yooka and Laylee tongue grapple up, so maybe that cylinder in the middle is related to raising the water level, like the puzzle to Rusty Bucket Bay (just basing that on the thin blue line, it seems suspicious. Also, there seems to be a faucet above the pool?) Or maybe the cylinder is some kind of giant battery to power the swamp lamps? It seems very...duracell. Just speculating
EDIT: Another thought is that maybe the assets change in the hub world according to what part of the world you've unlocked/expanded with the extra pagies?