The car must show the white light to signal that it's ready to accept the charging connection.
Pull up to the CCS, turn off car, open charge door and make sure the handle will reach. Do not plug in.
Follow instructions on CCS, normally, select power type if CHAdeMO / CCS, then normally the payment step.
Provide payment by cellphone app of the provider, or Credit Card, or RFID card of provider.
It will tell you to plug in and/or to press START.
Press UNLOCK on your keyfob to get the white light.
Press START on CCS if required.