Post #14 shows the starboard side hose running back to the tank and not having a three way valve, manual or electric. Apparently you can only run motor functions on the auxiliary side. Your machine does not have total tool control.
I don't know boat terms and had to google that lol But the hose on the right side of the arm is the side that gets pressurized when you hit the peddle on the floor. I couldn't really get a pic of it but it runs around behind all them valves and plums back into them on the backside. Nether hose goes back to the tank.