First, yes, I could bike over to my local shop but with Covid still a presence, the less contact the better at the moment.

Just got a new Specialized e-road bike. While I believe that the yellow piece might be some kind of spacer to protect the disc brake calipers, the silver "fork" like thing was in the same plastic envelope. Actually, I'm not sure how to employ either item.

Then there are two studs on the non-chain side of the chain stay - well, when just now photographing them, I discovered they are rubber and protecting the side-by-side holes. There is a thickened plate on the inside of the chainstay. Purpose? Possibly a kickstand mounting position? Thanks in advance for any info.

Two "studs"

Tools or spacers of some kind?