89 supra/cressida cable replacement?

i was wondering if anyone knew a site i could go on or an online free manual i could look at for my 89 toyota supra. it has the same engine as the cressida. i have the transmission detent cable (the one that controls downshifting) (part of throttle cable embly) and need to know how to put it on. need to know if i need to remove anything or if there is a simple way to do it. thanks.