Push branches to Git

git push origin <local-branch-name>:<remote-branch-name>

Substitute for <local-branch-name> and <remote-branch-name>. They may be same or different, as you wish.

As you have set up the remotes already, the command is just

git push origin branch-name

on the first push.

Afterward, using git push origin would push all branches with the matching name on remote.