Step 7: Ground control to Major Tom
"Hey wait a minute!" you say. "How is this no solder?"
Ok you caught me. In this step I did in fact use solder. But you can in fact do this with zero solder. Here's how:
Find yourself some small crimp terminals as shown below, and crimp the end of the wire and then slide it onto the two tabs that are on the phono jack. Add some hot glue to make sure it stays put.
See? No solder! :)