im stuck in this game >.< at the big room in act 2 i need to shut the gas down or something but i cant get to it because i need a synchronize code thingy to open a door and they say that the code is in Loading Bay A303 but i have no idea where that might be...

Oh and they also say i need to get access TO the loading by but i need to get the code in the loading bay to get access to it?? wtf??
I hope this message is not super confuzing