I don't know about Hitchhiker (and I assume you're talking electric landing gear), but there were Zerk fittings at the top of the Lippert struts inside the front compartment on our last fifth wheel. I used a grease gun with a flexible hose fitting on it to reach the fittings.
Rob
U.S. Army retired
2020 Solitude 310GK-R
MORryde IS, disc brakes, solar, DP windows
(Previously in a Reflection 337RLS)
2012 F350 CC DRW Lariat 6.7
Full-time since 8/2015