i used a radio shack plug for each board... you can get the generic tips and just solder leads onto them.
the vga controller takes 12v on the pin and gnd on the barrel.
if you have the correct touchscreen cable, then you can use a barrel plug for that too. but that one is 5v on the barrel and gnd on the pin. this info is buried in the forum somewhere.
i used an industrial ac-dc power supply that i have for bench testing, but you can use power from your computer power supply if you want. the screen doesnt pull that much power.
also, im not sure if you have done this yet... but you might have to fix the hirose cable that DennisK sent you. the factory cable is wired slightly wrong. essentially, the controln board is sending out data on 8-bits per color. the sharp screen in the kit is only 4-bits per color. you need to move some wires on the connectors so that the screen is getting the "higher numbers bits" for each color. DO A SEARCH ON THIS. there is a very good explaination of what you need to do... there is also a link to the datasheets and the connection pinouts on the board here. i know because i posted them several times. if you dont do the color fix, the screen will look like crap and your gonna get really ****ed that you spent money on something that looks bad.