In 1968 I bought a Rockwell-Delta combination 9” table saw and 4” jointer that can use the same motor (but not at the same time). It was a clever tool design in one convenient unit but the table saw lacked the wider side table extensions. I added the two side extensions but had to move the jointer farther away from the table saw and provide a pulley shaft extension.
Adding a side support table onto the side of the table saw base provided a way to hold the jointer and still have access to the drive motor. In addition, a post supports the bearing block for the ½” dia. drive shaft pulley extension. The parts are made from ¾” plywood and 1” right angle cold rolled steel. Everything is glued together and then held with flathead screws and hex head bolts. I improvised a universal coupling by drilling a ½” hole through a section of discarded brass garden hose nozzle and fastened with cotter pins to the jointer and pulley shafts. The improvised universal coupling has worked well over the years but there are better ways to do this with flexible couplings.