Attach Canvas from Hierarchy to MP Player Spawn

Hi guys, I downloaded a script for UFPS to have a level system. It works simple enough and is easy to implement and all, except when I switched it over to UFPS Multiplayer. For it to work, it has to have canvas parts in the hierarchy which hooks up to the player prefab.

I'm terrible at wording things, sorry. Here's a photo of what I mean:

The UICanvas can't be added to the prefab that spawns in, how would I make it add it to it after spawn?