From memory, don't quote me.
Left stab pos synchro to left indicator
Right stab pos synchro to right indicator
L/R/C stab pos RVDT to L/R/C Flap Cont Units
FCU's passes stab pos to L/R/C FCC.
Each FCC needs independent pos ind for cat III ops.
No idea what feeds T/O Warning other than FCU Stab Pos. My guess all.