rgb booster mod on arcade monitor,help needed!

[asdf]

I want more vivid colors on my arcade monitor.
And i do not wanna adjust this on the monitor itself.
But boosting the video signal out from the pcb would be a great option.
I once had a color booster rgb cable for my super famicom.
It had these little "thingies" soldered in the red green and blue lines.
So now i wanna mod the rgb cable just like that.
What parts do i need?
Is this even possible for an arcade monitor?