Spool Manager - Gcode Location

Hi All,

I've been using Spool Manager for a few weeks now & love it.
Just pushing in the filament until it stops; then letting it advance to 30mm it states,
sometimes adding an extra 10 or 20 to get a clear colour change.

What I'm wondering is where that bit of Gcode that advances it 30mm is stored.
What I have in mind, of I can edit those lines,
is to add a few extra commands to position the print head over a purge bucket & extrude the filament there.

Have had a brief look on Git, but see no mention & can't find much related anywhere else.


Edit:- Originally stated "Filament" not "Spool Manager"