For those inclined to need a HUGE capacity battery disconnect switch, here ya go. This came with my car in a box of "extra" stuff. Appears to be unused. AFAIK it is over 10 years old, so I suspect this is a Pollak #51-302, now replaced by a 51-902.
180 DC Amps (Much larger inrush rating!), 6-36 VDC, 3/4" mounting hole, 3/8" brass terminals & nuts. Total OAL is about 4" with body at a 2-3/4" diameter.
This is for completely disconnecting your battery... from other circuits. The manufacturer warns that if you use this on an alternator equipped car, that you must turn the car off first before you disconnect the battery. (Field circuitry is not isolated to allow just flipping the switch off!
$27 shipped
Cheers! Thanks for looking!
Steve