How do I know which fret I need to hold down from the above chords? I know which string, and with which finger, but I don't know where to hold it down.

EDIT - do the Xs mean mute?
If it's in the first box it's 1st fret, if it's in the 2nd box it's 2nd fret... and so on...
Sorry I'm bad at explaining...
put it this way. The top line represents the nut. If it doesn't represent the nut, it will always say on the side.
If it wasn't for bad luck, I wouldn't have no luck at all
the Xs mean dont play that string
Peavey:Raptor Sig. series
Peavey:EXP Sig. series
ESP LTD: V-500
Orange 2X12 cab
Peavey: JSX
Peavey: XXL