Kisses - Keep it Simple & Effective Solution (5 minutes or less).
1. Use a small torchlight to see the screw & tall thread at battery's side.
2. Spray WD40 on it (use red tube that comes with it). Wait small.
3. Get 16mm Spark Plug socket (temporary remove its inner plastic) and add wrench with 2 small wrench extensions and gently apply pressure.
Easy Peasy - no cutting ties etc. You can use a copper tube and washer to replace if you wish but its not really necessary.
BillStreetKa
February 2014