This is electronic modification. So, you need Soldering iron, solder, and more erectronic tool. I do not describe each individual tools.
A.You MUST have following items.
Component cable for NGC.(Digital A/V out -> RCA 3 plugs: You need original Nintendio's)
10k ohm resistor. 1/8W Small one recomended.
Thin wires --- any of lead wire. I recommend, you will have 3 colors.
Vinyl Tube --- Internal diameter at 6mm. Thin skin tube will be nice.
Oven Sheet -- Oven Paper. Is for makeing dinner,sweets... Yes, this is for kitchen. Thin paper, hard, thermal torelant.
VGA Female Connector & Cover.
Isolation tape. Regular Vinyl tape can be use.
Double sided stick tape.
Thermal Shirnk tube(Sumi tube,Hisi tube..etc)
This mod require very small object soldering. So, you must have enoygh skill for that.