Hmmm, I tried posting this earler and lost the image, etc. Anyway, the key shaped brown plastic next to the Creek Bank logo is covering a 3/8 inch hole. With the motor stopped, lifting this allows air to vent from the dome. Air in the dome causes the Bait Spa to float up. This creates problems because all the bait is under the Bait Spa. Venting the air keeps the Spa on the bottom of the bucket. The brown mesh is rain gutter leaf guard and keeps the bait from hiding under the Spa. 
This is the Sea Pro right after the installation of the T top and bimini. Rod holders on the rail, the trolling motor,
main auxiliary Creek Bank Bait Tank will all be s hown later.
Just who is that masked man?
Ha, ha, it's only Joy T Brew using face protection that is necessary on the boat at speed. Rain, wind, cold, and bugs (Buggs Island Lake) all add up to some damage to the eyes, etc.
