This cable from MikesXS has the fiddly important bits already attached. If it was me, I'd chalk the DIY cable up to experience, keep it as a spare, and drop $30 on a pre-made cable.
http://www.mikesxs.net/product/48-9150.html
Then you can either run it as-is, or worst case like me, you snip off the throttle-end barrel, cut the housing to the length you want, thread your new throttle barrel onto the cable, make sure it all is the right length for your setup and then cut the excess cable off. (my Photobucket account is overloaded - need to fix it so you can see the pics but this is the link to my project thread from years back)
http://www.dotheton.com/forum/index.php?topic=448.msg70431#msg70431