Which speaker wire does this hook up to?

I just had installers run speaker wires in wall (dry wall was taken off for remodel) to both surround back left and right.  Also my left front speaker wire is run in wall to the left front of the room.  I now have 3 speaker wires terminating where my amps will be.  Other than connecting each wire to the output of my amp, turning on the amp with source (which would require essentially setting up my system) and then seeing which speakers get signal, is there a tool that can test which termination wires go to which speaker?