Hey guys, just got my first Mitsubishi eclipse 2000 days ago.

The keyless fob was hardly working, so I went to replace the battery and a metal peice flew out....
I don't know where to place it now, or if i need to reprogram my thob or what????
Pictures included:

http://img714.imageshack.us/img714/7564/scan0002wd.jpg
http://img101.imageshack.us/img101/1008/scan0001st.jpg

Also I am having trouble finding the wiring diagrams for my eclipse 2000 with the infinity system.
Anyone who has links to the manual that would contain this or some picture links I would be very grateful to.