Looking to replace the oil in the OEM winch as I'll wager it's never been done. Looking at the FSM, it's the same plug for removing and refilling (at 3 o'clock). I'm a bit confused, how do you get the oil out (and back in)? Do I need to siphon it, and use some sort of a thin pipe to inject it back? Or is there a separate drain plug I'm missing?