I don't know the number but there is a work around if you can't find one. My 630H had the connector removed and new wires were connected right to the board. They are screwed on so it's an easy mod. I use an Anderson Powerpole connector on the wires.
Yes,it's been covered ,all the 30 H radios use the same powercord as the Kenwood 100 watt HF rigs,the 30 series lowpower(no H in the model)use a cheap cable from Kendoo.com.
mod
for tk 630-h part number kct-17 remote mount/ dash mount. kct-15. for low power [dash kct-14] for high power dash kct-15. all kenwood part number's. hope this help's.