Hi, you only need a riser cable, the panel at the back can be rotated 90 degrees and the spacers, serve as supports , mounting points are available in 3 positions at the bottom of the enclosure.
https://lian-li.com/product...
Scroll through there, it has a picture quite far down where you can see the turned bracket and the two supports.
I bought this cable because I didn't want to mess around with other cables.
Lian-Li PCIe x16 riser ribbon cable - PCIe 4.0 (20 cm)
It just looks like shit, but it works and the dimensions fit on the two posts. Fortunately, a large part is covered by the GraKa afterwards.

They are all compatible

Power card? Do you mean graphics card?