Yes, there's a third choice, and something like vwpower44's photo should be somewhere.
What Fred missed is that there might be some place out of sight where the one set of wires coming from the amp splits out to several other single sets of wires going to the volume controls.
Get the volume controls out of the wall and track down their specs. Some matching volume controls have nearly invisible switches for adjusting the impedance. This hardly matters, though: you have a fully wired one zone several room system.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
