Leo found his variant: Retail US. Beside it lay the file: XT1955-5_OCEAN_RETUS_9.0_PPOS29.114-134-11_subsidy-DEFAULT_regulatory-DEFAULT_CFC.xml.zip.
To be certain, put your phone in bootloader mode and run the command fastboot getvar product in a terminal.
Once you have the extracted files and fastboot ready, the general steps to flash a Motorola device are: