Looking for some additional guidance on sub placement

[dvon1981]

I'm using a pair of SVS SB3000s. There were both on the back wall but had bad sub 40hz response. Moving them to opposite ends of the right wall has helped massively with that. Green is before and the blue is after. No smoothing applied here. The ~50hz suckout is the main challenge. This is all pre room correction.

This is the current placement in the room with dimensions and subs on the wall.