For assets, when filling in both URI and URI2, the URI field value is used for both links on /client_asset_details.php
This bug report also comes with a suggestion: on /client_assets.php, when both URI fields are used, pop up a menu when clicking on the icon in the right column that allows you to select which link you want to visit.
Context: I use Lansweeper for inventory scanning, and Observium for metric collection and alerting. Not all assets fall into this, but some of those fall into one PLUS they have a web interface. Sometimes they have all three, like network equipment. I'm not asking for all that accommodation necessarily, just giving context.