sewing machine problem

[littleweirdgrrl.livejournal.com]

There doesn't seem to be a way to put a needle in my machine!  I bought this old, absurdly heavy sears kenmore (model 5150) machine a while ago.  No instructions came with it.  It runs fine except for not having a needle.  Where the needle should be, there is a screw that looks like it should be the thing that holds the needle in.  But there is no hole or anything to stick the needle into.  There's this weird thick wire that goes under the screw thing and goes off to the side in a little spiral.  I thought maybe the needle gets jammed under the wire somehow, but that makes no sense.  Does anyone have any idea how to put the needle in?  If not, any suggestions for websites that might help?