I recently retrofitted a 7100 hst smc q60 loader on to my older manual 7100 as the motor is bad on the hst. Off of the hydraulic pump on the side of the motor is a hard line that connects to an aluminum/steel block with two hydraulic ports. What exactly does this do. I saw a post before where a guy was making them. I have a cnc , if its something simple I could technically make one. The only other option would be to use the selector lever under the seat