I have not been impressed by the owner's manuals for many Rvs - it is often a generic manual covering all makes and models from the manufacturer and vague besides. Would not surprise me if there is little or no definitive info there on jacks, or if th einfo is there but no jacks are installed on your particular coach. Jacks were definitely an optional item on this year and model of motorhome.
If you have leveling jacks, there will be some sort of controller near the driving position, either buttons or a joystick, with labels like Front or Rear and Up or Down. The controller may be labeled with the manuacturer's name, probably either HWH or PowerGear. Underneath the coach, just ahead or behind the front axle and just behind the rear axle you should be able to see a mechanism that has a "foot" pad (either square or round) and probably with a coil spring attached (the spring helps retract the jack).