Additional Fields functionality/availability in SDP 8100

Additional Fields functionality/availability in SDP 8100

I am in the process of configuring my Service Catalog templates for an upgrade from SDP 8100 from 8027. I am noticing that the additional fields I have configured for my incident templates are not available on my Service Catalog templates. They are not available to drag and drop on the Service Catalog templates.
 
It is very important that we have the ability to utilize additional fields on our Service Catalog templates as we use them for prioritization, etc.
 
Would you advise how I can use additional fields on our Service Catalog requests?
 
Thanks

                  New to ADSelfService Plus?