So I have mounted my reservoir/pump horizontally onto the top of my Corsair 460x power supply shroud. To do this I had to drill some holes into the shroud itself. When the screws pass through the holes that I drilled, they touch the top of the power supply (Corsair Corsair RMx Series, RM750x, 750W, Fully Modular Power Supply, 80 PLUS Gold Certified) which is mounted with the fan pointed downwards through the bottom of the case. Is the top of the power supply case conductive? It feels like it could be plastic. Please advise. Thanks!