Bugzilla integration missing info?

Hi,
the documentation for bugzilla is quiet unclear to me.
I have bugzilla 5 running.
I’m supposed to enter these:

  • description
  • project_url
  • issues_url
  • new_issue_url

But I have no clue where to find these urls…
how do you play around with component in bugzilla versus bugzilla project?
issue list of complete product or for a component

and so on…

all help is welcome

EDIT:
I have added:
project url: http://bugzilla.xxxx.lan/bugzilla/describecomponents.cgi?product=:issues_tracker_id
issues url: http://bugzilla.xxx.lan/bugzilla/show_bug.cgi?id=:id
new issue url: http://bugzilla.xxxx.lan/bugzilla/enter_bug.cgi?product=:issues_tracker_id

in the admin page.
For one specific project I replaced :issues_tracker_id with the name that is given in bugzilla (of the product, not the component).

However there doesn’t seem to be any talk between bugzilla and gitlab… How can i debug?

EDIT:
Using gitlab community edition

EDIT:
nobody?

EDIT:
bump