Correlation between Tx switches and Pixhawk channels

I have an IRIS+ and FS-TH9X transmitter controller. Can someone point me to an explanation of which switches on the transmitter correspond to which channels on the Pixhawk?

It’s up to you to assign the switches you want to the channels you want (on the radio)

Perhaps I am missing something. My transmitter has four switches on the top but there is no designation as to what the switch is called programatically. If I open the transmitter, will I find designations.?

There should be little writing next to each switch. I think once you get into programming mode that if you move that switch it fills that entry in for you on that channel. Some channels need to be mixed to do the mode channel.

Ch1 - AIL
Ch2 - ELE
Ch3 - THR
Ch4 - RUD
Ch5 - Mode - Mixed
Ch6 - P3 - Nob on left
Ch7 - ELE switch on Left
Ch8 - GEAR (Added) Switch

Mike