Instructables

Step 5: Reassemble Camera - Attach to Timer

Reassemble your camera - you may need to cut a small hole for your new wires. Then attach your wires to your timer circuit on the normally open ("NO") side of the relay and the common ground ("COM"). The polarity does not matter too much as we're only completing a circuit with no components in between.

I ran into trouble here. Apparently, I was shorting the trigger switch to another grounded component. Not good. It basically locked up the camera as it didn't know what to do with the bad data. Just be cautious on your wire placement and add some insulation if necessary -- a little bit of hot glue works wonders ;)