Be sure and check the current rating of the disconnect. Momentary surge current through the starter windings can go as high as 500-600 amps or so, and it's not a matter of "if" but "when" the low-amp switch will fail permanently. We used the 1K amp disconnects on all the race cars we built. There's no such thing as having too much current capacity.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!