The tricky part of using that connector is keeping the contacts from corroding. Particularly on a 6 volt system, even a tiny bit of resistance in a connection can limit the current available to the starter, resulting in low cranking speed.
The racing associations where I used to compete wanted a quick-disconnect switch available to emergency crews in case of a crash with fuel spillage, so we mounted the switch I linked to on the roll cage in easy reach from outside the cars.
Jerry
