Rams retracted is when you check the hydraulic fluid for the slide outs. So, it is most likely for the HWH slide rooms.
If you check the level with the rams out, the level will indicate "low", so you will fill it up, and when you retract the slides, all that fluid you just added will come flowing out all over the compartment.
Check your manual on the slides, it will tell you which fluid to use. HWH actually makes their own brand. I used ATF, but it contains a red dye, so if it ever leaks, it will stain what ever it might get on.
Of course this is all a guess based on "rams retracted".
01 Country Coach Affinity 42 Enclave Toad
Lilly the Raschon and Lulu the Terrier.