It is in the compartments behind the rear wheels. On the driver's side, it is on the rear wall where the electric cord is stored. Likewise, it is on the rear wall of the compartment on the passenger's side.
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2021 Micro Lite 25FKBS
2021 Ford F-250 XLT CCSB 4wd w/ 6.2l and 6 sp. transmission, 3.73 locking axle
Here is what I do on my 3010ds.... I run 60lbs in the air bags for the rear. 80 tire pressure in the rear 75 in the front. This has made quite the nice ride. Eliminating the push and turbulence of the passing trucks and semis.