Follow these steps to uninstall and install SSD modules in your Mac Pro. To perform this process, you must have:
Apple Configurator 2.12 or later installed on any Mac that supports macOS 12.4 or later, is plugged into a power source, and has internet access.
You may need to configure your web proxy or firewall ports to allow all network traffic from Apple devices to Apple’s network 17.0.0.0/8. For more information on the ports used by Apple products, see the Apple Support article
Pull an SSD module straight out. Repeat with the other module.
Slide the housing over the computer, then turn the latch clockwise 90 degrees to lock the housing.
Mac Pro can’t start up until the housing is replaced and the latch is rotated to its original position.
Reconnect all cables, except the power cord, to your Mac Pro.
Plug in a monitor so you can see when the process of restoring the firmware is complete.
Plug the USB-C cable into the Thunderbolt port farthest away from the power button. Plug the other end of the cable into the Mac that you will use to restore Mac Pro.