Hi folks I'm thinking about the idea of putting 2 USB ports in the rear ashtray and maybe another one in the armrest/coin tray of my e46 I want them to look as if they are OEM so they have to be neat and tidy so my question is how easy is it to do and what's needed to do it? They will be used for the kids phones/tablets and the front will be mainly used for my phone.

I'd love to hear from some one in the know who can point me in the right direction.