Library Lookup makes it easy to find things in Omni. To configure it, go into Zotero's settings, to the General tab, and find the Locate section. Click on the Resolver option, and a list of continents will show up. Go into North America and find Queen's University.
The Zotero Locate menu allows you to view attachments or look up a citation. You can set the "Library Lookup" option to search in Queen's University Library.

Another option is to enter the base URL manually by copying and pasting the following link:
https://ocul-qu.primo.exlibrisgroup.com/discovery/openurl?institution=01OCUL_QU&vid=01OCUL_QU:QU_DEFAULT