I purchased a couple of the 'smoke' colour buttons, to replace a couple of uninspiring buttons on my picade. The wiring instruction on this site are all you need, I simply wired the button power lines in parallel to the power lines of a cannibalised USB cable (red to red, black to black) the switch A and switch B lines were connected to my picade board. The button look very classy, with bezel illuminated and the button unlit. A more subtle effect than a full illuminated button, so ideal for smaller cabinets. The connector on the back of the button just snaps on, very simple. The buttons are secured with a screw ring mechanism, so very easy to install/swap. Tempted to get another six for the actual game play buttons, but the price of these is a it high compared to plain buttons, or even fully illuminated ones, so perhaps best for special function buttons unless you have a plentiful budget.