So yes I am a total newbie to LF and I am having a panic attack.

I just bought a Linhof V and while trying to open the blades I pushed to hard and the lens has moved counter clockwise about a half inch. (I didnt know that I had to push the little button as opposed to pushing it so the lens moved.) To make matters worse, a little pin, also about a half inch long fell on my lap! After looking at the camera I think this pin has come from the place to insert the cord for making the exposure.

I can't seem to get the lens to turn back into the correct position and where does the pin go?

Help!