Exchange Spindle "Tab" with something else

I do have an Kress 1050 FME-1, just manual ON/OFF (automatic via Zigbee Switch) and speed control. So the Spindle Tab in Gmoccapy is useless.
Is there any EASY way to exchange it with lets say ON/OFF Button for the Spindle?
 

This is documented here:

linuxcnc.org/docs/html/gui/gmoccapy.html...tabs-and-side-panels

You can replace the spindle box with your own glade file / function.