The built in foot pedal needs to be hardwired to the machine, so if you've got one that has a double ended plug, then you can use that instead.
If you want to use a knee controller, then you'll have to put one in.
I have the two versions of this cabinet, along with three other cabinets of a very similar style out in my storage shed now. The one DH was using, he took off the foot controller and used his 201 with the regular double sided cord. I used mine for a "dashboard" White. That machine had the two cords with plug in ends (Japanese made) so DH rewired the cabinet so it has an outlet to plug the machine in and I could use the built in foot controller.