gamecube portable mod

[nexus881]

Alright i am going to make a portable gamecube, i just bought a rca portable tv with the atsc/ntsc built converter built into the unit unfortunalty it doesn't have rca wire connectors, i was wondering if there is a place on the tuner to hack into the picture on the unit. Its model number is rtv86073. if anyone can find info on it it would be a great help because im having issues finding it myself.