ragamuffin

I am in dire need of help with this one. The scout patches must go on!!
My daughter tried with the Featherweight and it seems she tried everything
including moving the motor back because the belt would just spin around.
Then she has a full birdnest under the fabric. Stopped with that machine.
Onto the Babylock. The first patch went on, and then all of a sudden the
whole needle holder fell off with needle attached, the little last thread ring
dudad also. When I turned the holder, a little bullet shaped thing came out
but I was able to keep all the parts. Now I cannot keep it on.
Is there a very small screw that holds it on? There is a hole on the right
that looks like a screw hole. No screw in sight.
I have an old White machine and will have to bring that out. But the
Babylock has shown beautiful stitches and I was going to use it most.
Please help me. Thanks so much.