the sfx did come with the bridge... it is likely you dont have the latest sovereign bridge that 3rd era created?
the sfx for the FC Excelsior bridge uses those sfx... also be sure you have
BP Core installed... then again, if you have a KM install, all this would be included...
anyway if you go to the bridge's plugin located in the autoload folder...
add in the following lines -
follow this as an example:
'bridgeSound': {
"LiftDoor": {"volume": 1.0,"file": "sfx/ebridge/ebdoor.wav", "group": "BridgeGeneric"},
"AmbBridge": {"volume": 0.1,"file": "sfx/ebridge/ebamb.wav", "group": "BridgeGeneric"},
"RedAlertSound": {"volume": 1.0,"file": "sfx/ebridge/ebklaxton.wav", "group": "BridgeGeneric"},
"YellowAlertSound": {"volume": 1.0,"file": "sfx/ebridge/ebyellow.wav", "group": "BridgeGeneric"},
"GreenAlertSound": {"volume": 1.0,"file": "sfx/ebridge/ebgreen.wav", "group": "BridgeGeneric"},
"ViewOn": {"volume": 1.0,"file": "sfx/ebridge/ebviewscreenon.wav", "group": "BridgeGeneric"},
"ViewOff": {"volume": 1.0,"file": "sfx/ebridge/ebviewscreenoff.wav", "group": "BridgeGeneric"}}
where sfx/ebridge/ ---- .wav is the path to the actual wav file
also, every character, every indentation, everything must be exactly as shown or youll get a BSOD...