it will "work"... but i dont recommend it.
you will create resistance, and you are opening up your system to interference.
but yea, if you just want some RCA cabels to work, then its been done a million times, no big deal. afterall, its only wires.
but i'd at least make 100% sure that none of the little strands of wire are touching at all. (its a low impedance signal, so it wont fry anything if they do touch, but you will get a lot of noise.)