thats a brill idea but by the looks of it there aint much space. And i dont know the + or - side.
Being an LED you could just rotate it until it lit up correctly?
I've recently bought 3mm for my Golf switches, makes a big difference and seem to be just as bright? Gives you a little more room? By 12v LEDS and then no need to wedge in a resistor too?
Good luck! I spent a good while looking for you on the web and only found people with the same question you have?!