Dynon D-180 connection to GTX-327

I hope someone here has run into this problem.
Connecting my Dynon D-180 to my Garmin GTX-327, I am not sure of the connections.
The schematic with the GTX doesn't show a Dynon hookup, but it shows pins 2 & 20 from the GTX connected to the input for a Garmin 400 or 500 Series, but the RS-232 In 1 & RS-232 Out 1 are pins 19 & 20. Pin 2 from the GTX is RS-232 Out 2
Does the wire from pin 13 on the D-180 connect to pin 19 (RS-232 in 1)? on the GTX? and does the wire from pin 21 on the D-180 connect to pin 20 on the GTX (RS-232 out 1)?
Or does the wire from pin 13 on the D-180 connect to pin 2 on the GTX (RS-232 in 2)?

Anyone?

Hopefully, I understand your question. The Dynon Altitude output (pin 13 on the 180) should be routed to pin 19 on the GTX. Pin 2 and 20 on the GTX goes to the Garmin 430. Hope this helps.

Dynon Pin 13 TO GNS-430 Rx AND GTX-327 Rx (Pin 19)

GNS-430 Tx TO GTX-327 Rx (Pin 2) -Aviation data from 430 to Transponder for auto STBY

No need to use GTX-327 Tx (pin 20) since serial Altitude to the 430 will come directly from the Dynon.

Stien? Please help.