Both, disassemble the inside , plastic sleeve, guide tube. Remove the drive,remove the cable core , using a solid core from a control cable (available at most shops for free) insert wire thru cable to act as a guide, remove the cable nut, pull out from the rearof gimbal , and pull out from the drive leaving core in place.
R/R shift boot, insert solid core thru shift cable outer casing , hold solid core with vise grips, pull core and cable back thru boat , remove core, insert cable sheath into gimbal and tighten nut, insert shift cable flexible core, resassemble shift cable inside boat , check the adjustments with the Bravo tool