Hey Tyson,
if you manage to insert a M6 command into your g-code program, then the code you previously entered into the ‘tool-change’ field in the General Configuration Tab of the Onefinity Controller will be executed.
Regarding what to insert there, I cited some information here the other day.
I don’t have any experience with the Carbide 3D products, but they have a forum. Maybe you ask there if there is a way to activate M6 commands in the g-code output?