Banche, SWB offers an adjustable pull/pull cable setup with two ball links, two titanium turnbuckles, for 'adjusting' and two composite cable slings for attaching the cable. All you need for the rudder end is two ball links and two rigging couplers as Pettit stated. Off hand, I don't know the specs on the servo you mentioned, but all the 30% I've ever seen have two or three rudder servos ganged together.

I'm doing a 2 metre, 3W Extra Fun presently and on rudder I have one, 186oz./inch metal gear JR digital with a three inch SWB 'offset' servo arm, as I will be crossing the cables. The plane should weigh ten pounds when complete. Good luck, Joe