How do I take the AC inlet port out?

So hello there to the people of I fix it!

Long story short:

1. I got iMac 2012 for 69 cad
2. Went to replace ssd
3. Broke screen
4. No display
5. Decided to do something I always wanted to do (turn a iMac into a headless iMac (just a mac))
6. toke out all the parts from iMac
7. Got a bit of modeling done for the new case
8. Realizes I don't have one of the most important item
9. Came here.

So basically I need to get the AC inlet port out of the iMac, but um I don't know how.

Like its stuck in there good.

This image has like a black thing in the middle that's the inlet.

Any help is greatly appreciated for getting this piece and not buying any other part!