Your 25Z is robably a 2005 or newer and should have a modern 12VDC Power Distribution center in it.
I would find an unused 12VDC fuse slot and run a 12VDC wire drop to your radio location. There may be a fuse slot already there for a radio install...
Your trailer revolves around two POwer Distribution Panels one with 120VAC Circuit Breakers and one with 12VDC ATC type fuses...
Here is a typical 30A trailer Power Distribution Configuration...
The RV trailer is built with the idea in mind it can operate with all of its basic items being run from the 12VDC battery and then a few added high end appliances can be run from 120VAC when connected to shore power.
Roy Ken