2004 yz 450 head question

Just putting together a "new to me" 2004 yz 450 that I bought in pieces. Cylinder head is missing a bolt on the right side of the cylinder, just above the front right cylinder head bolt, above the exhaust....looks to be a 6mm bolt coming off of the right side exhaust port. The bolt is horizontal, going into the head from right to left....I have pic, couldn't figure out how to DL it???

I have gone through my manual front to back twice and scoured the internet and I don't see a reference to this bolt.....can anybody help with this? hoping to go for a first ride this weekend!

Thanks in advance!


Awesome, thanks very much!

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