That's what I use. Use flux paste or liquid too if you have it. Helps a lot. Clean well when done. Should be nice and shiny like a good solder connection. OK if you can still see orig cable color when done "Tinning" the cable. That is basically what you are doing. If you have ever "tinned" wire for an electrical project, you know what to do. Easiest to control heat application with a small iron and not a torch. Obviously keep heat away from outer tubing.
I use one of these at the servo end:
http://www2.towerhobbies.com/cgi-bin...4&I=LXE114&P=K
Tin the cable end before making final cut and it will slip in and not try to unravel. Many don't like these for flight controls but fine for throttles IMO.