MG Car Repair: 1977 M G Roadster, loose wires, starter switch

Question
On The back of the ignition, Which is located in the middle of the console, on my 1977 M G Roadster , there are a total of four wires connected to 4 different bolts bolts,one in the middle and three around the outer edge.Two Wires are loose or missing,( the one on the midlle  and one of the three from around the outer edge of the inside of the ignition.I found two loose wires in there. A Green One and Brown one.The two that were still in place around the outer edge are green and yellow. can you help me figure out which wire goes were? ?

Answer
Sorry for the delay, Charles.  My computer had a major failure - took 10 days to fix it.

Be careful, the brown wire is permanently live, so disconnect the battery before doing anything else.  Your starter switch should have 5 wires going to it.  The one in the middle is the brown one.

Counting in a clockwise direction, the outer 4 wires are (White) (Grey) (White with a Red stripe) and (White with a Green stripe).  If any wire is still connected, you should be able to work out where the others go.  If you don't have the anti-run-on valve, there may be no grey wire on your car.