Looking at the right and bottom side of your pic, you will see 3 slots on a angle. The black portion is the locking system and the white nubs part of the ABS computer.

Staying on this connector, look at where the wires are zip tied to the connector. Under this area you will see a ribbed area ( black plastic ) , pull this in the direction if the wires. ( down in the pic, along the length of the computer in real life. ) As you pull the angled slots will ride up the white nubs lifting the wire side connector from the computer.

It sometimes helps to gently pull the connector out of the computer as you slide the locking system.