Copy XML to INSTALL_PATH\StarCitizen\LIVE\USER\Client\0\Controls\Mappings 
Get into the game
Open console (^)
Type "pp_rebindkeys SC_3-17-0_Eramur_x56" (do NOT use ".xml"!!!) - You can use copy & paste here for the file name (CONTROL + V)
Confirm with ENTER
Close console (^)
Enjoy!

https://robertsspaceindustries.com/spectrum/community/SC/forum/50174/thread/x56-hotas-profile-for-star-citizen-v3-4-2