The #8264 Y connector cable has a dual headed plug with one plug having a round plug with five pins on one plug, and the other plug has a flat blade and a round blade; we sometimes call it a “Mickey Mouse” plug. The cord goes from the transformer up under the chair and connects to the motor and hand control.  Sometimes they can go bad, but mostly it is replaced due to either the chair mechanism pinching the original cord, or due to a pet chewing the cord.