On our 22' ssv, there are 8 screws that hold down two sections of floor down that I removed just to make sure someone didn't ziptie the cable to other wires before pulling it out.
Verify the routing of the new cable before you hook it up to the rudder for clearance and that it goes over/under things you want in case you don't use the string method from the very back of the boat. (I just used it to get the first 90 deg bend from the console).
They should provide a zerk fitting on the support bar to lube the end of the cable but there isn't enough clearance to fit one in. I fill that tube up with grease from the rudder end the best I can and then push the rubber cap over it.
2004 Supra Launch 22 SSV
5.7L Indmar Assault
"One More Hour"