Here is how to do it.
On transmitter, set to X-bus mode-A
Bind Rx to Tx
Plug converter cable into Xbus port on the Rx. To confirm what you are doing, plug servos into converter cable.
By default (from factory) the converter outputs are all programmed to throttle (01-01), (01-02), (01-03, (01-04)
if you have the 4-port converter.
On Tx go to "Xbus Setting", then "Servo/Converter"
Move throttle stick on Tx to confirm all servos move with throttle stick. If not press "ID Reset" that
does factory reset back to throttle on all output plugs.
(a) For example lets change plug "1" output from (01-01), to (02-01) aileron channel (02) sub-ID (01),
Top left buttons should read (01-01) If not set it to (01-01)) That is the current channel ID for plug "1"
Below left are buttons that also probably read (01-01). Set these to whatever servo channel you want.
In this example we set it to (02-01).
Press "SET". Should then get brief message "SUCCESS" and top left buttons will change to (02-01).
If you now move TX aileron stick you should see servo on plug "1" move.
(b) Now lets assume you want to program plug "2" for elevator (channel 3)
Set top left buttons to 01 and 02 (02-01). Then set lower left buttons to (03-01).
Press "SET" button. Now plug "2" should move with elevator stick.
You can set up to four servos on each channel. For example if you want two servos on elevator
(one on each half), you should program one converter output as (03-01) and the other as (03-02).
The direction and sub-trim can be set for each servo separately.
Hope this helps