I would just re-check the manual to be positive, but both units should work fine with a Cab-1L system. Once in place and powered up, the base needs to be connected to the outer rail. Fastrack is not necessary - it will work fine with tubular track.
Follow the set-up instructions for the units carefully. You will have to assign a number to each unit and it's a good idea to write it down so there's no confusion as to which number works which unit. Once programmed, my recollection is that you press "ACC", then the number, then Aux 2 to start it up, but it may be different on the Cab-1L remote from the Legacy remote.
