It all depends on the type of LED's you get. You can get the strips, or you can get some in pods, or you can just get a single led on the end of a wire. I can't really help with wiring them as I'm not very good at that sort of stuff yet...as far as placement though...
The pods and strips usually come with some sort of adhesive backing on them so you could stick them wherever you want.
The single ones depending on how you run them could just be zip tied to the frame or you could just use some clear silicone to "stick" it wherever it is you'd want them to be.
Thanks for all the recommendations! Has anyone tried the individual lights or only the pods and strips?