Remote Starter Solonoid

[bmfm64]

So I added a Ford starter solonoid to my SBC starting circuit and everything works fine, I just don't understand why? I ran the main wire to hot side of solonoid and then to the starter. I pulled the S wire off the starter and put it to the S on the ford solonoid then ran a 6gauge wire from the momentary big lug to the S terminal on the starter. Works fine and all that but how does it work? the starter is still just as hot as before? I don't get it. Am I missing something?