How to redeem pc battleborn code

I got my code for the pre order skins but where do I put the code in, there is no info on the website or even in game. All the support sites like 2k and gear say how to get the code, but where do I go to put it in

I think it’s under Extras, SHIFT

What are you playing it on

Says PC in title…

Mine were there when I installed the game. If yours aren’t, add the code via extras->shift.

found out how, got to go to games in steam, and hit add new product