I have created a necklace with a three strand slide lock clasp. It starts with the three strands then reduces to a single strand using a 3-1 connector and expands back to three strands using another 1-3 connector to terminate at the three strand clasp. The center strand is the one which continues through the whole necklace. My question is what is the best way to terminate the strands on the right and left at the connectors? I have tied knots in the beading wire onto the center strand but this does not seem very secure.