Chosen Solution

Does anyone know where I can get this kind of connector? It’s the DC Jack connector that’s soldered onto the mainboard.

Hi, That should be a 0TM5N3 connector based on your Dell model. The model number is usually written on a white sticker on the DC connector’s plug. I marked it on your photo below.

That connector seems fine to me (pins are still showing) and you could just solder it back to the motherboard.