auto oiler not filling tank on motor

Joined
Mar 11, 2013
Location
savannah tn.
#1
I'm hoping to get some help. I recently got a 20' pro craft w/merc. 200. Supposed to be a 93 model but not sure cause all it says on it is mercury 200 and 2.5 litre on lower cowl, no xr 2 or anything. I've never owned a merc before and really not familiar with em. Took it out the other day and ran great but when idling in the low oil light started blinking (I believe horn is disconnected). There is plenty of oil in big tank but tank on motor is low. There is a hose coming off of a tee that is not connected to anything it just hangs down, main line of tee comes from big oil tank in boat and top of tee goes to top of tank on motor. Now if pressure is what fills little tank I don't see how it can pressurized if there's an open hose but dont see anywhere for it to hook to. Any help is greatly appreciated.