The 'inconvenient' method: Removing and reconnecting the earth clamp each time
Time for a switch: The two cables coming off the battery
Suitable location for the switch, giving enough clearance to the bonnet as well as allowing the existing cable from the battery to be swung round from the fusebox to the cut-off switch, and the installation of a new ready-made link cable from the switch back to the fusebox.
Basic template for the switch bracket
The bracket with additional flanges for rigidity
Switch terminal covers
Fitted switch ...
... with bypass fuse for clock and radio memory