Magsafe DC- in connector board component replacement

Hi guys, some components got scraped of my DC in board (labeled 820 2565 A) a 3pin component and a 2 pin component. Since i am working on a dead macbook, id like to know if these components critical to operation (my hunch is they are just surge protectors), and if possible can someone help me out with the schematics and/or the identity of these components, i dont want to buy a new connector as i figure its cheaper to just replace the components. Thanks in advance.