Changing parent property of existing files and scripts?

I want to change the parent property of my files so that they are in my Classic Baseplate instead of my Workspace so that I can individualize my files so that they are in the background and not a viewable model, how do I move it into the Baseplate, instead of the Workspace? Thanks.

Try this

local part = game.Workspace:FindFirstChild("Part") -- For example

part.Parent = game.Workspace:FindFirstChild("Baseplate")