David,
One suggestion is to solder the wires directly to the chip that controls the remote. Most pins that come from the chip have several functions and will control different buttons depending on the pin in connects with through the button. For example, pin 1 and pin 4 may be the volume up. Pin 1 and pin 8 may do macro 1. Pin 4 and pin 8 may do power. Connection to the chip may offer a better solution to soldering on a trace or trying to glue it. Another is to drill small holes in the trace and remove the protective covering around it, if there is any. You will then have a better anchor to attach the wires to.

Chris