should be pretty easy in s3d.
just change the extruder to tool 1.
by default the hotend is tool 0 (weirdly so is the heated bed - never quite worked that one out) second extruder is tool 1, 3rd tool 2 etc.

So if you switch the wires to h-end2, and set up a profile using tool 1 - it 'should' work :-)

That's one fancy controller board.

Can't see clearly in photos, but make sure the temp sensor is also moved to appropriate socket - assuming there is one.