Silent Knight 5104B
The output you need on the Silent Knight 5104B is the Notification Appliance Circuit, sometimes simply called a NAC, but on the SK 5104B is called the Bell output. A bell is an Appliance that Notifies people (warns them of a fire).
There is a manual that comes with the SK 5104B that shows which terminals to use for the Bell, or NAC.
I Googled SK 5104B and got the manual at https://www.silentknight.com/CatalogDocuments/151053-L8.pdf
Get the manual and read it. The specifications you are looking for are in the UL Requirements and in 3.11.2 Supervised Notification Appliance Wiring. There's also programming instructions in the installation book.
Silent Knight 5495
The Silent Knight 5495 Distributed Power Module is a booster power supply that can be used. Get the manual and read the UL Requirements to confirm. The manual also has the settings for the programming switches in the SK 5495.
I Googled SK 5495 and got the manual at https://www.silentknight.com/CatalogDocuments/151161.pdf
You should also talk to the technical support people with Silent Knight. Technical support is there to help people like you and me when we have problems.
Read the Manuals
I have 20 years experience troubleshooting fire alarm systems. That 20 years is part of 45 years of electronics work. I still read the manuals, you should too.