I Nnotice that this side pod has a "shelf" shape like the Aston Martin. So some sort of coanda effect could be going on here on it's traling edge.
As I was pondering before on the Aston, the benefits of using the fully allowed surface for cooling slats seems to be much greater than the low volume of a small tapered side pod.
This amount of hot air could be directed to where it can be huge benefit (and not a detriment). Without any real evidence, I say the diffuser is an intuitive location.
Yes, it's nothing compared to the exhaust blown coanda exhausts of 2012 but it should be enough to add some decent energy.
Why I don't think using a ramp style side pod is better to get the hot air down to corner of the diffuser, is because these side pods simply fall out of the legality zone for the cooling slats. The result is you would get air down there, but not hot air. On the other hand these shelf-style side pods uppoer surface lie in a way so that you can have the full amount of slats and maximum hot air to use to influence the aero.