Good thread at the right time for me, I am helping on a lakester build and we are currently working on the wiring.
The main disconnect is inline with the positive lead close to both the battery and main electrical supply relays, fuses, etc. It has a T handle, one end is attached to a cable which runs forward to the cockpit for a "pull off" reachable from the drivers position. Currently the other end of the handle has a rod running to the rear for an external "pull off" mocked up. Reading the thread has made me aware of how vulnerable the rod portion might be in an incident, take time to back up a step, and consider a cable "pull off" to the rear. Longer cable to the rear would also be easier to adapt with should we add longer rear sub structure and body panels in the future for improved aero.
Thanks to everyone for all the input.
Ed