1965 Dodge Dart Charger

I had posted one before. What I have is a Lenco Panelspotter like this one.

http://www.ebay.com/itm/LENCO-PANEL...1472562474&pt=Motors_Automotive_Tools&vxp=mtr

Would it be possible to mount the negative cable to the body and positive in the handle? One "arm" cannot get in on the backside!