After welding the cable wheel to the primary throttle linkage, I had to build an end-housing for the same linkage to mount it against the firewall. Also necessary was the clevis for the cable.

Fortunately, I keep a lot of scrap metal sitting around, so it was pretty easy to throw something together. It's hodge podge, but it works. I'll eventually build something more permanent, but in the mean time, here are some pics.