Oh wow. Yeah you definitely went after that one.
The best thing I can think to do at this point is use two needle nose pliers at the circled locations. Then pull up in a rocking motion. Don't put your face over your hands because when it lets go you may punch yourself in the face (I have done that).
As for removing the entire unit, I would not do that either. As you can see there is a lot of wiring under there so I would just get the relay out and you will be much better off.
Let me know how you make out or if you need other ideas.
Monday, April 6th, 2020 AT 4:26 PM