Electric trunk release

Would appriciate some information on the electric trunk release button location. I bought one of these off ebay and note that the lead wire, from latch to button, is only like 5 feet long. Not long enought to wire all the way to my dash from the trunck. Does anyone know the correct location to install the button for a 69 Dart? I can extend the wire, if necessary... just want it to be somewhat correct location.

Thanks for your help!