External Audio Source Connection 2 -R231- (USB Port), Connector

There are two versions: 11-pin and 4-pin

Fig 1: Identifying 11-pin External Audio Source Connection 2 -R231- (USB Port) Connector

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1. VCC (+5 V) 
2. D (+) 
3. D (-) 
4. Ground 
5. Screen ground 

Fig 2: Identifying 4-Pin External Audio Source Connection 2 -R231- (USB Port) Connector

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1. D (+) 
2. VCC (+5 V) 
3. D (-) 
4. Ground