rob.dren.1981

help im converting my 96 wrx to a sti 3 90mm maf
does any one know how to wire it in please?
the sti 3 maf is 3 pin
my wiring is 4 pin

i need the sequence of the pins please eg neg, pos , signal and which one is which from the left hand side of the maf to the right with the maf in its fitted vertical position

please help as going for my remap on mon, cheers rob