A month back I asked this here and never did get a response.
After messing around I finally worked it out.
I grabbed a copy of the map from the Lear45 and pasted it into the panel.cfg file which is in the panel.71 folder. I changed the location numbers in the cfg entry until the icon was sitting right below the gps icon.
gauge19=SimIcons1024!Map Icon, 345,500
I assume that this procedure can be used in any aircraft.
It's probably a good thing to make a copy of the original file and rename it to something different just in case.