Shortening the handle by cutting a section out of the middle would be your best bet. You really don't have to shorten the cables. They are anchored at each end and should still work properly. You may have to get a few zip ties to anchor the excess cable to the handle, so it doesn't snag.
+1.
Maybe find something that will fit the inside diameter of the tubing to join the two ends that were cut and drill and put a bolt and nut for fastener. No welding.
