Astron Duplex Multi-Cap

[Hawk]

I might need to replace a multi cap--Astron Duplex multi-cap on a Gibson Maestro Reverb Echo amp. Haven't tested it yet but I want to understand how it works before I check it out.  On the side of the cap is says that the black wire is common. The other wires are for 20,10, and 10 ufd. Is the black wire the common ground wire for all three caps and does it tie the negative ends of all the caps to ground? Are the other wires the positive ends of the 20,10 and 10 caps and got to circuit? Thanks

[galaxiex]

Yes,
yes,
and yes.

[Hawk]

Thanks!