innovatek in 704l monitor loose wire

The red wire with a fuse on the factory harness that plugs into the monitor came loose. I don't know which of the 3 remaining slots it goes into. There are numbers on the harness up to 6 which is also is the total number of slots. I need to know which slot it plugs into.Lattimus

Do you have an ohm meter?  Or can you borrow one?     If you do not have a meter you will have to take the unit apart, there will be a diode that has one leg connected to the Ground wire.  and the other end of the diode will be connected to the terminal that the red wire is to be connected to.  The diode will be very near the plug.  It may be a surface mounted device, it may have no legs.  But it will have a grey line on one end of it.

No I dont have an ohm meter. I ended taking the unit apart. On the circuit board the neg wire path runs into another open slot which 2 paths leads into a large cylindrical unmarked black plastic coated diode with a wave-like symbol directly underneath it with two legs . Beside it is a small cylindrical diode with lines going halfway across with two legs. Which then leads into a cluster of diodes. Is this the slot I should put it in?Lattimus

You may have to take a picture.   Unless you can follow the ground connection to a diode, and follow the other side of that same diode to a terminal that the wire could possibly have came from.