hi guys, i have the cooler master 430 elite. it is not that great for cable management but there is a hole by the power supply to feed the cables through behind the motherboard (as you can see on the image below) , the only problem is the hole is not big enough to fit my 24pin cpu cable through.
there is a hole next to the psu that would be capable of fitting it through although there are brackets in the way, i was wondering what would be the best tool to get rid of these brackets so it is just a hole.
i have circled the point on the case of which i want to remove.

edit: there are holes behind the bracket, i also want to remove the piece of metal in between them, i was thinking of a dremel.
there is a hole next to the psu that would be capable of fitting it through although there are brackets in the way, i was wondering what would be the best tool to get rid of these brackets so it is just a hole.
i have circled the point on the case of which i want to remove.

edit: there are holes behind the bracket, i also want to remove the piece of metal in between them, i was thinking of a dremel.