If you are purchasing an esc on this order and would like Offshore Electrics solder connectors onto the ESC- First select the connector size you will need on the "Battery end", see picture above in purple. Female connector used on the black/negative wire.Male connector used on the red/positive wire.- Second select the female sized connector you will need on the "Motor end", see picture above in blue.IMPORTANT: Keep in mind this may delay your order from 1-3 business days, depending on our backlog of work.Required: -This can ONLY be purchased on an order that also includes an ESC on the same order.NOTES: - The picture shows an ESC as an sample only. NO esc is included with this purchase.- The Seaking 180 and Raider 150 ESC already come standard with 6.0mm connectors on the motor end. - If the customer selects "No work needed on this end " for both the motor and battery end, NO work will be performed!