Ignition Problem now

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Well good news is i know what it is,
Just wondering if any1 Knows Where to find a Diagram of the ignition Of the 85 250sx. Like where i put my key in?

Bottom came off, No idea how and the inside piece fell out.
just an fyi on how it goes back together.? Its not in the manual, If so i dont see it
ill try to upload pics tomorrow


Also what does a Burnt/Greyish black Spark plug mean?

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Ahhh never mind i found this in there..

"Check the switch for Continuity Between the Black/White and Green wires with the switch Off
And Red and Black When the switch is On.."




Also i seen in the manual that my Choke was broke. and the guy drilled a hole inthrew the cap . So air is leaking in threw there for sure, Witch the manual on theres looks like it prolly shouldnt..

Any Input??