Hi Joe,
I'm on an iMac, so I guess my set-up is fairly similar to yours. Here's a screenshot of the St. Albans (England, not Wales) page in my game:
View attachment 147775
As you can see, I have kits in place so I have the images and a working config file located in the correct position among my files - St. Albans being one of many non-league clubs that you can download from here, if you want:
https://www.dropbox.com/s/glbffbadtpztwk1/England - zzNon-League 13-14.zip?dl=0
These are the kits from season 2013-14; I'm more concerned with getting realistic looking images into my game - it's not so important to me whether they are bang up-to-date. But if you want to update the kits, you can use my files. Just make sure that the new images have exactly the same file name as the files they are replacing and save them over the existing images. There are threads on the Sortitoutsi.com site where you can download updated versions of the kits, if you want.
https://sortitoutsi.net/graphics/packcat/2/218/ss1516-league-kits
3D Kits are a different kettle of fish. To my knowledge, nobody has created them for clubs so far down the pyramid as St. Albans, but I think you were referring to the SS style kits shown in my screenshot anyway, weren't you? Again, there is a thread on the Sortitoutsi.com site where you can request a custom 3D kit, but I didn't get much joy from it when I requested Melchester Rovers last year.
Here's the location to put this folder (as per my machine, anyway). Do this before you load up your game and the new images should be in place when your game loads up:
Documents > Sports Interactive > Football Manager 2016 > Graphics > Kits > SS_Kits Updated > SS_Domestic League Kits > (place the downloaded folder into here)
Please let me know when you've done this and I will remove the files from my Dropbox. Others can ask me to make them available again in future - there's just limited space there. I also have logos for every team in England, which you can download from here if you want:
https://www.dropbox.com/s/7ko8pr3jzjx27km/England.zip?dl=0
Scream if anything goes wrong.