a tower heatsink can be faced either upwards OR to the rear...
as long as the warm air is exhausted
efficiently from the case, it makes no difference.
1... there is a roof fan to aid the expelling of air, but it is slightly offset from the cooler !!!
2... where is the other noctua fan?
3... in the orientation that you have it at present, the d14 is sucking hot air off the GPU !!!
...not a good idea
turning it to exhaust out the back of the case is better...
1... the rear exhaust fan is aligned better with the D14, and this will increase the release of hot air from the case
2... the pull of air through the heatsink will be cooler, as the air will not be heated by the GPU (as much)
nice cable management though