I sell attachments at my shop. A customer of mine says he has a John Deere 89 skid steer but he doesn't know where the controls are which control the hydraulic outlets on the front of his skid steer. He says he does have two connectors on the front but he doesn't see any way of turning them off or on. He wants to use a brush cutter. What would he need to install? A valve? Thanks for your help