Washer on the backside & inside of the basket. Should NOT have to grab the clutch arm to install the cable. Install the cable on the clutch arm first, then attach the cable at the lever. If the cable does not have enough slack, either it is the wrong cable or "something " is allowing the pressure plate to move closer in. There should be 8 fibers & 7 steel plates. If the cable is too short it could cause the slipping.
DoldGuy