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TPS62160: Question regarding schematics and PCB

Part Number: TPS62160

Hello,

I am currently building 5V/1A from 13.4V (4xLifePO4 Batteries) and while I am building the circuit, I am not sure if this is right path to draw PCB. 

I have attatched schematics,and PCB design that I have. but the problem is, since somehow 1-4pins considered to ground, I am having hard time organizing where i should put component.

can you guys please give me an advice what could be the better idea?

thank you!