Not too familiar with 330's, but I recently traded for several that have a trigger set up I've never seen before. These traps are from the '80's but have never been put out. Has anyone had any experience or seen triggers like these? Also on the corners of the trap in the third picture there are little covers with a cotter pin. What are they?

Those are the safety releases. You can tie a cord on the cotter key and if you get caught you pull the cord and the spring comes off.

Those triggers sometimes work in pinch. Get some better triggers and you'll do well.

Wishbone Trigger. Factory stock on first model Series 2 Conibear by ATCo.

Note - you are getting a lot more responses on the main forum. It tends to confuse people when you ask the same question in 2 different places.

I know, I won't use this forum again. Thanks