How to use plasmacli send to send tokens between two addresses? about plasma-mvp-sidechain

so I am trying to guess how sign and send works, currently testing plamsacli sign, I can sign with my first address like below

plasmacli sign 0.0.0.1 --from 0x965dfa534B1bC4a88c60BA4287e4ceaF38eC7B50 --owner 0.0.0.1

It asks me for passphrase, after enter it, it produce output below

Confirmation Signature for utxo with
position: {0 0 0 0} 
amount: 0
signature: 36937ddc1295f7b8dafa99d27697f38e01c1c226b0e98b4fe5545e29a7ef4fe1001223cfaf5a309be743787b2290a15089e5602edbe3b9e63d87f512e0b12b7501
UTXO had 1 inputs

Notice the position is {0 0 0 0} not {0 0 0 1}? is the signature in the output the one I need for Input0ConfirmSigs in plasmacli send? what should I sign to produce Input1ConfirmSigs?

I am thinking maybe I misunderstand how position works? {0 0 0 1} and {0 0 0 2} should both belong to the same address, and I should use the same address in genesis.json?

With @AdityaSripal 's help, I am able to send 1 token from address A to B, closing the issue now.

plasmacli send --address 0x965dfa534B1bC4a88c60BA4287e4ceaF38eC7B50 --amounts 1,999,0 --position 0.0.0.1 --to 0xCBE12C2c094a773c076F1f2d189c06fAaCD34EDD,0x965dfa534B1bC4a88c60BA4287e4ceaF38eC7B50