Fitting rear diffuser/Feed sidesteps?

[probedb]

Does anyone have any thoughts on this?

Just occurred to me we don\'t have a bodywork section in here

I can see holes where it looks like the stock skirts would go but unsure how to use them. The two side bits of the diffuser that attach to the car have holes drilled where the rear spats would fit. But the side steps have no holes so not sure where to attach?

Ta

Paul.