ROM Hack Is system info stored on a 3ds/3dz save file?

[Wekker]

I am planning to upload some of mine 3ds game save to filetrip. I was wondering if a 3ds game save contains any personal info or system info on a 3ds save file?
How about the 3dz save file?
Does it still contain unique game header if i extract it with save data filler?

Thanks