Is This Earth Strap Man Enough For A Mondial

I am now removing the troublesome cut off switch near the battery and wondered if this earth lead would be man enough. The seller stated it was 8mm (with insulation) but couldn't give me the ampage. I have an Optima 34r if that makes any difference.

I don't have any crimps (M8 end) that big to make my own leads.

Thanks pete

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=180150812331&ssPageName=STRK:MEWA:IT&ih=008