On my old bass boat with dual cables I purchad a cable lube system called cable buddy and a bottle of synthetic lube. Worked fine. It consists of 2-s/s nuts drilled for lube,1 for the motor tube,1 for bolt on tube. A bottle of synthetic lube with adaptor and hose. Just remove plugs after install turn bottle up side down and turn wheel from stop to stop every 3 months or so. I got this from bass-pro,easy to install. One hole to drill thru tubes after replacing one existing nut on each tube.