Installing PSU upside down??

So i am putting together a pc build myself with a new cabinet, mobo, RAM and a PSU combining with the CPU and GPU from my old case which was assembled and built by an old friend two years ago when I didn't have much budget..

So now all my parts are here, but i am confused about one thing, how to install the PSU inside the case? Whether the fan should be facing down or upwards...My cabinet has a hole at the bottom for airflow but don't know which would be the ideal orientation for the PSU Fan?

For context my new pc build parts are Cabinet- Antec Nx410 Motherboard- Asrock b550m pro4 CPU- Ryzen 7 3700X GPU- NVIDIA RTX 2060 RAM- Crucial Ballistix 3200mhz(16gb × 4 sticks) PSU- Cooler Master MWE 750w V2 80+ gold & also a Noctua NH-C14s air cooler for cooling the CPU.