TUSB8043A: Unused pins

Part Number: TUSB8043A

Tool/software:

Hello team,

I am only going to use this part for USB2.0.

What should I do with the unused pins of USB_SSTXP_xx / USB_SSTXM_xx / USB_SSRXP_xx / USB_SSRXM_xx?

Should I open or GND them?

Best Regards,
Kei Kuwahara