onto the shell, double-sided tape works perfectly.

so it should be attached onto the shell itself? or onto the circuit board?

it sits directly below the start/select buttons.  the circuit board is shaped to fit underneath them, the lights shining up into the buttons,

you'll need to trim away a tiny section of the plastic wall surrounding the start and select buttons though, to let the light shine into the silicone.

I was wondering if anyone had any pics or suggestions as to where to place the circuit board for Kitsch's RGBss without it getting in the way.

I've been trying to figure it out before I start soldering but can't figure it out.

directly behind the buttons doesn't seem to work.

any help please