I'm discovering stuff on my 3 that I'm curious to know something about. I'm hoping ya'll can help. I've attached some photos...
First is:
I saw these under all my doors but I can't tell what purpose they serve? Anyone know?
Second is:
I've been told this is some sort of diagnostic connector but I was curious to know if this should have some sort of cover. Would sure look a bit more finished if it did.
Anyway appreciate any additional info.
First is:

I saw these under all my doors but I can't tell what purpose they serve? Anyone know?
Second is:

I've been told this is some sort of diagnostic connector but I was curious to know if this should have some sort of cover. Would sure look a bit more finished if it did.
Anyway appreciate any additional info.