Confused about pinout for gigabit ethernet on tx2 nx

I’m tyring to add ethernet to our custom carrier board, but the pinout on the TX2 NX is for gigabit ethernet. Is there a way to wire 100 base T to this gigabit ethernet, or anyone know of a chip in existence that can do this?

This picture indicates you cannot change the PHY.
And this GBE can support 100 baseT too… You can test that on NV devkit first…

I figured it out. If you connect the pins like the photo below, the port will auto-negotiate to 10/100 base T as long as the port supports auto-negotiation.

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