Is it possible to connect two Xavier NXes over PCIe?

Hey everyone,
I remember from AGX Xavier that two developer kits can be connected over PCIe with a crossed cable. However, that developer kit have an PCIe x16 interface on it while the NX dev kit has not. So, my question here is: Is it possible to interconnect two Xavier NX devkits (over M2 slots or something else) over PCIe? If possible, how?

Thanks for your time and effort in advance.

Please refer to NVIDIA application note NVIDIA Jetson AGX Xavier PCIe Endpoint Design Guidelines (DA‑09357) for details