how to make Panorama hotspot creation between 2 panorama?

hello

I am new to unity and trying to make an panorama application in unity. now i have got some idea about unity from community that i have to create skybox and then i have to use cubemap for creating panorama in unity.

i have already done that part to create cubemap and made material . and i build application and it is working fine.

Now i have 7 panorama which are related to one another . and for that i need to add hotspot in it and need to connect this panorama. now which way i can do it i want to know about it.

any help would be appreciated