Trying to mount vertical and horizontal PCIe devices at the same time in a Core P6

[termitavee]

I have multiple PCIe devices  (GPU, video capture, PCIE to usbC, Wifi and BT board) conected to the case, At the moment I have all devices horizontal but I'd like to put the GPU vertical in front of everything.

The GPU fits but there is no grip to keep it in place (I'm scared It could fall for whatever reason), I found some GPU holder, like this one,  wich could make the job but I'd like to gather more info/alternatives if possible but I cant find any info related to this specific topic (mix vertical/horizontal PCIe)

 

Thanks.