FM Antenna

I have looked online for an answer to my question to no avail. I have a vintage receiver I want to hook up a 75 ohm coaxial antenna lead to. 

Picture of FM connection

I want to use the 75 ohm connection. I get putting the bare center wire under the screw. The clamp for the cable is what I have a question about. Do I remove the cable insulation to expose the ground mesh ? Do I leave the cable insulation on? 

Thanks