git - How to set the right CocoaPods source -

i'm trying create first cocoapods dependency having problems source.

here's github repo. url should set source folder ybtopalignedcollectionviewflowlayout source folder? seems can set complete repo source.

adding on @orbey said have take or nothing of source. although can write podspec sources files directory shouldn't matter. @ of existing specs in repo examples, practically of have that.