Simply drag & drop all the files of the repo in the scripts/mp folder of your MW3 dedicated server. Edit the file matl_config according to how you need it, there are included all the lines to ...

Running bin/plutonium-bootstrapper-win32.exe t6mp /home/container/Server/Multiplayer/ -dedicated +start_map_rotate +set key CXyJqEAkaZ4K3WDPZnF4uDFf4akmPWQv +set net ...