I am setting up a home theatre system in a room that has been previously wired for 4 speakers mounted high in the room corners. This speaker wire is puny, and not of a thickness that I would even consider for speaker wires.

I believe the previous owner had a "High End" system, but I never saw it.

The speaker wires have been just cut off with a side cutter leaving short bare ends hanging out of the ceiling. I have installed a couple of new Yamaha NS AW194 speakers in the right place for rear surround, connected with the existing wires.

At the other end there are 5 coloured RCA male plugs coming out from the wall (helpfully labelled L & R Front, etc). Should I look for a female RCA to banana plug type lead, or am I best just to cut off the RCA ends and extend them to where my receiver is, and terminate with banana plugs?

In an ideal world I would just love to rewire but this is a very difficult house to wire. I have tried pulling on the existing wire to see if I can use it as a guide to pull through another wire, but it seems to be set in concrete...

Any help appreciated.