*** BEFORE & AFTER PICS UPLOADED *** Tomorrow I am going to have my gauge faces changed from black to silver (NA Auto version).  I have read in some places that I should take off the negative terminal before removing the gauge pod.
So here is my question:
Do I HAVE to remove the negative terminal to make this work?  If I don't, will I fundamentally screw up my pod?
 I just don't want to if I don't have to (lose all presets, settings, xm will have to be reflashed, etc.)  I don't have the stock radio in, I have a Pioneer AVIC-N3.
 

 Thanks for any input!