They won't. Those rods are ends for balsa or hardwood pushrods. Looks to me like you're set up to run pushrods through guides directly to the control surfaces, so you should have gotten two very long rods, threaded on one end and smooth on the other. I'm suprised, being as you have a Sig airplane, that they weren't included. You could go to your Local Hobby Shop and get a pair of 36" long rods, threaded 2-56 on the end. They go directly from the servo to the control surface through the guides (the white plastic tubes). You'll have to cut them to the exact length you need, 36" is probablly way too much but better to have them too long. Or you could try to contact Sig and tell them you have missing parts, and they'll probablly send them to you.

I feel your pain as far as the missing parts..... but it happens.

Andy