How to setup external issue tracking Gitlab server

Hi

Cannot find any up to date doc on setting up our Gitlab instance as a remove task server. Normal git operations are fine but I want to be able to list/manage issues stored on our Gitlab issue tracker.

Normally this is done by adding the remote server. You provide support for Gitlab remote servers, but there is no doc anywhere about which URL should be used.

Currently I have tried (using the "Test" button on the server dialog box):

https://ourgitlab.example.com/ => 410 Gone

https://ourgitlab.example.com/api/v4 => 404 not found

Here is a screenshot of the setup: https://assets.weeblr.net/images/screenshots/weeblr-2018-07-10-15.46.53.png

I have tested with a new token created from the https://ourgitlab.example.com/profile/personal_access_tokens page.

Gitlab instance is the current one, GitLab Community Edition 11.0.3

Please advise and/or provide link to documentation for that supported feature.

Best regards