Edit: Tested and found the right syntax:
Obviously replace "selene" with "eos" for Eos abilities.Code:/hotbar pet "Embrace" selene 10 4
This didn't work when /hotbar first started taking these commands. It only started working with a hotfix/patch (the same one that fixed copying to/from shared hotbars after 2.3 broke that).
Edit: Also, you can do the same thing with /micon to get the right Embrace showing: /micon "Embrace" pet eos