How to integrate virtual tour link within the certain unit

How to integrate virtual tour link within the certain unit

Hello,
In one of our projects we got very specific request from the client.
They created Virtual Tour of one unit type in the building, that they want to put inside that unit.
This VT is external link, that we were thinking to show as a button on the unit scene.
The question is, how we can show the button only on that specific unit, but hide it for other units?

Please let us know if you need any additional information to answer the question.

Thanks