Very common occurrence with the D350. Sorry this happened to you. Bowtechs customer service has went down the drain, I have had a similar situation with them. I stopped shooting their products and will not shoot them again. The Barnesdale limbs are top shelf and the best fix for your situation...
Like others have said, bottom pic is arrow rest. Top pic is the sight base, part that mounts to bow, sight head is missing. The logo is the original Bowtech logo when Bowtech first cam on the scene.
2014 Obsession Evolution, Qad hdx rest, Spott Hogg Real Deal 5 pin sight with .10 pins, 3/16 G5 Meta peep, Bstinger sport hunter extreme stabilizer, Scott Sabertooth release, and Easton Hexx 330 arrows. Althought I am becoming a fan of Black Eagle arrows (GA company as is Obsession).
Back up...