Trying to hook up alt and primary on an old otis gamma D. THE building has been vacant for years. With no print. I see a feed coming into HSS and jumped to ASL ... I have fir2 above HSS with no wires on it and a FIR 1 up a few terminals with no wires as well. Then under ASL I have a GES and a BYP . Does anyone know how this circuit works and where my alt n primary and fire hat wires shoukd go