7275 cooling system help

[bodydropped72]

hello all i inherited a tractor some time ago. the radiator was shot so i had to remove it to have it re-cored. so it sat sometime until i got around to putting it back together and im having trouble finding out where a small hose reconnects to. its 1/4-5/16 nipple that is right next the lower radiator hose. does anyone know where this might go to or have pictures? thank you in advance

 

[ChasHM]

On my 7305, this nipple connects to the drain cock, which is mounted adjacent to the lower radiator hose. Out the other side of the drain cock is another hose heading to the back of the engine; presumably it drains the block.

The critters seem to have eaten the tabs off the bottom of the drain cock. Maybe it's leaking a bit and the like the sweet but deadly taste of antifreeze?
Anyway, my parts manual doesn't show the drain cock so it may not have been on every model.
Lastly, you could block off your nipple, fill the tractor with water and see if any leaks (or sprays!) out when you start it up.