I just bought a pair of Tokico Trekmaster shocks for the rear of my 1997 4Runner. I have seen torque specs for tightening the top nut but it is impossible to get a torque wrench up there. How tight should I tighten the nut to compress the bushing? Also the Trekmasters came with a rubber bellows for the shock shaft and a cable tie. Where should I attach the cable tie, top or bottom of the bellows? Thanks.