here is a couple of examples of a pull/pull for a tail wheel but the basic idea applies to a rudder as well .

first is the attachment at the servo using small quick connects for my FW190A8 which is currently under const. here's the build thread http://www.rcuniverse.com/forum/m_56...tm.htm#5620546

second is my P-47, the attachment point for the P/P,and rudder push rod,and the tail wheel.
for the P-47 I used ball links with soldered threaded ends, to the 30lb test steel rubber coated fishing leader,I crossed the wires through some extra golden rod, on this plane I also put EZ connectors at the tail wheel so I could take up the slack of the wires this was my first attempt at a pull pull set up, it works great,and is smooth, but tightening the wires is time consuming since acess is limited through the fuse, for the tail wheel, for a rudder obviously alot easyer .

the set up on the FW190 is much more strait forward, again the cables are crossed in the fuse, running through some plastic tubing,whats different is I used cable crimps,I got from the bait and tackle store, at the tail wheel, there stronger than you can believe, and then small EZ connectors at the servo.
I pull the wire tight through the EZ connectors and tighten the allen screw down there is no slack what so ever when turning the servo either direction I am planning on a push rod for the rudder on this particular build.

but for any other P/P application these methods work well,I have found that crossing the wires help with keeping the slack on the wires to a minimum.