How do I upload Chapters on this manga ?

There will be a flag on the side and then you press other

on the manga page there is a white flag on the middle left click there & under "other's" option post the link & mention the chapter numbers & mangago will do the rest

Thanks guys

I screen shot the chapter I want to add so it is in my galary. So what link do I give?

before giving an link you need to upload them to goggle drive first