in any case its actually the diff casing thats differant. the sensor goes in the pinion shaft area i think. if its a later one its got the two sensors on each stub axle.
the abs aint going to work without them hooked up. you will have to have a look undernieth the car around the diff and try and find the sensors dangling or the plugs. determining if its got the pinion sensor or the two sensors on the diff cover.