What is this called
Not sure if you are looking for a specific name for that connector, but it is off your ABS block. Here's a schematic courtesy of shoebox:

www.shbox.com

www.shbox.com
If I'm not mistaken, it looks to be a connector for the wheel speed sensors. Regardless you most likely have an ABS light now, if you didn't before, and your ABS will not work.






