mannmade

so i have an escort and want rear discs, but i have abs, was told focus hubs fit the same bolt pattern as my rear beam, great simple done, but wait suddenly i need to machine the hubs to fit the escort abs ring and then drill the abs sensor hole to fit the escort sensor, not so great, but the question that i cannot get an answer to is... why cant i just use the abs ring and sensor that comes with the focus hubs? can i not just cut and wire in the focus sensor wire to the escort sensor wiring?