#1
Today I bought a Russian muff and when I unscrewed it to keep the battery wire hanging out I noticed that there was a wire soldered to one of the screws that keeps a little rubber foot in.

What is the purpose of that?
Ibanez SR505

EBS MultiComp
BOSS GEB-7

Ampeg SVT 4-Pro
Ampeg SVT 810E
#3
Grounding
My Guitars:
Gibson Les Paul Studio
Epiphone AJ
Ibanez Strat Copy

Amps:
Orange Tiny Terror Head
Old beaten up Peavey cab
Marshall MG30DFX
#4
Ah okay thanks.
Ibanez SR505

EBS MultiComp
BOSS GEB-7

Ampeg SVT 4-Pro
Ampeg SVT 810E