So, maybe it's just me or maybe the Harbor Freight instructions just suck, but I'm trying to put hydraulic fluid into my 2 ton Harbor Freight Cherry Picker so that I can lift my engine and fix my motor mounts or add shims. The instructions mention to remove an oil fill cap and to pour oil into the cylinder until it overflows; however, nowhere else in the entire instruction manual does it mention which hole is the oil fill hole. So, naturally I look at the cylinder and say, "Hey there is this rubber fitting and this hole is at the highest point of the cylinder, maybe that's it." So, I yank the rubber fitting, which was a pain in the butt since it's tapered, and grab my bottle of hydraulic fluid and dribble it inside. Not knowing if it's doing anything or even filling, I say to myself, "Let's test to see if it's actually doing anything." I grab the rubber fitting to put it on and due to the taper it doesn't want to go back in the hole.

So, I'm just guessing here, but I did something wrong, right?

Any tips or advice? Is there another way to adjust my motor mounts without using a cherry picker?