So I was doing my first oil change on my KTM 525 EXC 2005. By mistake I loosened this "location screw" and oil started draining from there. Only this oil was much clearer than the oil coming from the main drain screw. This is the screw: Is it supposed to be removed when doing an oil change? They didn't do it in the tutorial I watched: Also, there's only one way to fill oil on the engine (plastic screw), right? Thanks in advance.