Just split the Output wire from the x96 and connect separate leads to the EFIS and AP. Make sure that the output speed is set to LOW for the AP; the EFIS doesn't care. TT Wiki has AP wiring instructions as does the installation manual.
Oh, and make sure you run the black ground wire to your Avionics ground point along with the EFIS and AP grounds. Serial requires both the "hot lead" and the shared ground to operate (e.g. it won't work if running the x96 off of battery and ONLY the blue wire is connected).