Electrical Components

Well since I can't seem to find my wiring faults, may be too many, I'm digging into the diagram and trying to 100% identify my system components. Want to make sure on a couple as they don't match up to replacement parts I see online. Trying to decide if I want to try and rewire or buy a kit from Year One, Ron Francis, etc. So meantime, please forgive my ignorance as I learn more every day, but can someone identify the pictured parts.