Cold you give a little more detail on the parts you used? With my current setup I don't have a shirld.
I used two connector wires from a computer cd-Rom connector as suggested by OEMVALUE. I hooked up one connector to the 11 pin under the R10 connector, and the other one to the 13 pin. I then connected these to a Radioshack amplified speaker. The 11 pin is connected to the input, and the 13 pin is connected to the shield.
This works okay, but doesn't sound good. I've been looking \for a different speaker. Connecting to the JBL amp would be cool, but my current setup would not have a shied or ground.