O.K. got it!
As milegajo pointed out, a typical centrifugal clutch is not bi-directional. From the photos I found, this is a typical clutch. You will not be able to pedal start it.
I haven't had one of these; but I'm guessing the centrifugal add-on renders the original clutch useless in terms of function. Just make sure the original clutch is adjusted properly so that it is always fully engaged. I can't see why you would want to install the cable and handle either.
"PS...All the stuff you've done is awesome!!!!! Keep up the good work my friend. You are a large assett to this sight and MB's...POPS"
I've got a few motorized bicycle things planned for this year. I just have to get it done.