Perhaps you can add people with commit rights. The one you want to
add is "inkscape.dev", which is the team of all people with commit
access to Inkscape trunk.
I haven't figure it out how to transfer repos. It's too confusing (what is a series if it's not a branch and why so many pages...), but I managed to change the owner of the branch (or would it be the series?) to inkscape.dev.