FitCustomer,
You are correct about shorting B3 and B4 together and joining it with Terminal 4.
db et ac,
I had the B5 and B15 hooked up to Terminal 1 but when I did that the sound did not work properly so I took it off and kept it just on B15. The sound is AWESOME and there is NO interference. It sounds as good as a your mp3 quality and speakers can get hahah.
Gabes Dad,
Heatshrinking is easy. You just buy heatshrink tubing. It comes in a roll and you just have to heat it up with a heatgun or a lighter or something thats somewhat hot. It's just good practice with electrical connections. I checked RadioShack and I dont think they sell the 3.5mm wall-mount plug, but I could be wrong.
Here is that pdf that db et ac was talking about.
http://www.cui.com/pdffiles/SJ-43502PM.pdf