yes I believe he is say ing to solder/hard wire the PCIII in. it is the over all best way to connect the wires for that warm fuzzy feeling. I soldered and heat shrunk mine as well.
It sounds like you only have a desk top. Uf thats the case then your right it will be difficult to reprogram it.
if so you may be able to buy a long usb cable if your computer is next to a window or a door.
a laptop is the best setup for a soldered in PCIII.
if you still want a disconect/connecter, and can't find the one you want at radio shack then I would suggest your local marine/boat shop for a high quality water resistant style plug.