24 pin ATX won't click into motherboard

[U123]

Doing my first build and have been struggling to get the ATX into the motherboard, I've been trying for 2 days now, I've tried to get help everywhere and everyone just tells me to push harder and wiggle, but I've been constantly pushing as hard as I can to the point the motherboard flexes and I've wiggled it plenty, and this is all the progress I can make. There is a little gap and you can see the clip doesn't get under to engage. Do I have a faulty cable or something? The pins are not bent, I attached a picture of them just to make it clear that is not the issue. This has been making my first build a nightmare, would've been one of the last steps before I can finally use it but I'm stuck because of this shit.