i wouldn't mind it at all... if you can solder onto a .1" pitch header(or through-hole if the header is removed) then you shouldn't have issues attaching any cable to the converter board. i would need a estimate on the diameter of the insulation for the cable so that the box can have the proper sized hole in it to pass the cable through.

if you can't, or don't want to risk it, then you could mail me the existing end and i'll attach it. expect around ~$2.30 to ship it USPS first-class in a padded envolope.

either way, that's less parts for me to buy, so i can cut you a break on the price as well.