LOL. At least there's no doubt it WILL get them apart.
@ OP - glad you figured it out. When it comes to harnesses, try this trick. I have never come across a harness that I cannot easily remove using two flat tip screwdrivers (unless I can’t reach it). The idea is to use the tool to work for you.
Using two screwdrivers, insert the 1st to push against the release clip, insert the 2nd one right into where the clip meets the base. Use a slight twisting motion with the 2nd screw driver to separate the two. OR you can hold the harness in hand and press the relesae clip with your finger and use the screwevier to 'twist' them apart. It comes off without a fight everytime. Avoids the risk of breaking the locking clip from trying to pinch too hard or yanking too hard with your hands.