connecting Garmin 327 x-pdr to the Dynon 180 for altitude info.. I purchased the pre-wired package. Does this not include the 25 pin harnass that connects to the D-180 ? If not, do I only need the plastic(harnass) part and the 2 pins (#13 and #21) for connection to the G-327 ? This sounds correct, but please let me know if I need more... thanks.