Looking at the videos from Denver where it shows good resolutions in the motor etc, it clearly shows that the same holes are already there for installing the strut Cross Braces like in G20 series 3 or G22 series 4...
This is the struts in a series 3/4:
Here is the exact same prepared holes + all the elements are prepared to have a brace passing without touching anything:
Since G42 is based in same platform as G22, I think the OEM will fit also in G42, but also there are plenty of other resellers, this one with different colors i like it:
https://burgertuning.com/products/bm...40i-and-m340ix