Is the "red dot" the same as R or L?

My turntable and cd player are not marked with a "L" or a "R" to show the right and left connections, instead, they have a "red dot" on one terminal. My preamp and amp are clearly marked with "L" and "R".

Does it really matter so long as I'm consistent through the system chain, (ie. I assume the "red dot" is for the right? Or is their an industry standard the "red" means right (or "red" means left)?

Thanks for your help