Hi Fretters!

I have a Fender Mustang I that I plan on adding an extension speaker out to. I already have the shorting jack (to switch off the internal speaker, once the external is plugged in), heavy-gauge speaker wire and a jackplate. What I need is an easy to understand (and easy to see...my eyesight sucks) wiring diagram. I've been Googling this, but I haven't come up with anything I can use. It should be very simple. Anyone?

Thank you in advance!