When I did mine, I clipped all 4 wires (signal wires (x2), brake wire, and the wire from the bike). Stripped a half inch or so, them, then kinda twisted them in a fashion that resulted in the wires still forming one "line". I used heat shrink tubing to then insulate them. However, if you aren't as concerned with a super clean look on your wires, yeah how you mentioned would work. I would use a bit more than tape to hold the twisted wires toghether though. Like you would use in a ceiling fan, those rubber "wire nuts" would work to hold up to the vibrations of your bike. I'd still cover the wire nut with electrical tape though for added protection. The better option than the wire nuts would be to solder it, however if you don't own a soldering iron, wire nuts with tape will work just fine for ya.