I don't see mount module documentation with the Ekos doc at docs.kde.org. In particular:
On INDI Control Panel for Celestron AUX mount
1. What does "On Set": Track, Slew, or Sync mean?
2. What does "Home": AZ/RA, AL?DE, All do?
3 On Motion Control Tab What are the effects of Motion N/S, Motion E/W and Reverse.

On Mount Control, for GEM mount, I presume up/down arrows are for DE and left/right for RA. That seems to be the case for my Celestron CGX mount, However when I slew with one axis, I see both RA and DE values changing.

Personally, I'm not familiar with Celestron AUX, however...Sounds like you're really looking for INDI driver doc, not doc for the mount module. For INDI drivers you can find a top-level page here: www.indilib.org/individuals/devices and if you want to dig into Celestron, you could follow the links and get here: www.indilib.org/individuals/devices/telescopes/celestron.html or for the particular Celestron AUX mount: www.indilib.org/individuals/devices/tele...tron-aux-driver.html