I opted to buy a 3510 fan and not modify the rear panel. Direct replacement, much quieter. https://amazon.com/gp/product/B07V1M74CG
Those fans are incredibly cheap, and I had one fail already. Also, the JST connector needs +/- swapped to match the PCB.
Be careful putting 12V fans on a 24V circuit - may result in early failure. May want to consider installing a buck converter to drop the voltage to 12V