Wiring passenger cars for DCC

I have several old Athern passenger cars and I would like to have lite interiors. Where do I get parts and instructions to do this ???

I saw a guy use several of these

http://www.walthers.com/exec/productinfo/475-100YCL01

They are kind of pricey but you can make them shorter if you need to.

Here is the flourescent one

http://www.walthers.com/exec/productinfo/475-100ICL01

Thanks, I’m sure these will help !!!