1972 seat belt relays (?) deleting options...

First, I am purely a hobbyist and my opinion is not the final word. This site has a ton of really knowledgeable users and I bet you will find a definitive answer. That said, I unplugged my door buzzer (because it annoyed me) on my 1972 Duster with no bad affects, it just stopped howling at me. I also unplugged and discarded the (broken) bench seat sensor and seat belt also...again, no problems. I left everything in place except the seat belt connections and bench seat sensor. I clipped the connectors off of these and saved them (they where in great shape) and used a dab of RTV and heat shrink tubing to isolate everything. I believe the silver relay you took a picture of is the door. Hope that helps.