Where the two 6-port Norgren valves for rear leveling are mounted on the rear bulkhead, which is at the back of the bus in front of the drive wheels, if you raise the bus fully with airbags and support it, crawl up under and look forward, you will see both 6-port Norgren valves. Keep going up, and Prevost installed, I think, three 4-inch PVC pipes that travel the full length, not counting the suspension. Sorry, I don’t have any pictures.