Hi @greeneli
Here’s the [https://download.lenovo.com/consumer/mobiles_pub/ideapad_310-14isk_310-15isk_310touch-15isk_310-15abr_hmm_201606.pdf|hardware maintenance manual] for the laptop.
This details the necessary pre requisite steps and the procedures to access the components in the laptop.
Here’s a link to just one [https://www.ebay.com/itm/303534359207|supplier] of the part. It is only to show what it looks like and the cost of the part. There are other suppliers online that may suit you better. Just search for ''Lenovo IdeaPad 310 Touch-15ISK Dc-In jack'' to get results