How To Remove Breaker Cover?

Alright I may be an idiot thats missing something but how do I remove this cover? Nowhere in the manual does it show you how to remove it. I went on CMSNL and looked at a diagram on the cylinder hear and can see that there's 2 screws connecting it. I can easily get one of them out but for some reason the other ones covered by a plug (product number: 9033411035). So how do I remove this plug so I can take the top cover off?

 

Thanks, that what I thought but didnt exactly want to start drilling if there was a better way. Also, is there any reason why there is a plug in the first place. Eventually when I put everything back into place, would it be find to exclude the plug so I don't have to keep buying them when I decide to open the top end up.

 

Alright i guess that's makes sense. But man is it a really stupid inconvenience

 

Hey I finally was able to get the valve cover off and I had a question. Ive worked on dirt bikes alot so im new to valves and all that. Is there supposed to be a liquid in the valve cover? Like its not alot but its brownish. It smells like burnt rubber, or something similar, a off putting smell. I tried smelling some of the oil I pulled out of the bike and its similar in color and it has a very slight but similar smell to the oil,, but the valve cover liquid has a way stronger smell.