You don't type anything in. Some servers glitch out when you try to use esp so make sure you're trying on different servers. I didn't add a command in there to a turn on or off. You inject a bypass and you type in lua_openscript_cl.
(If it doesn't work try to change the name of the lua to HACK. Make it one word, sometimes when you try to inject a lua with a space it won't load, so change the name of the lua script to HACK or anything else that is one word and type lua_openscript_cl HACK.lua that should work.