using factory horn button

I own a Ford F350 2005. I would like to use my factory horn button to control the stock hoen and use a toggle to switch to the Nathan K5’s. Please advise on what I would need to do? I am not a wiring genius but a metal fabricator. I have spent hours making my wiring perfect but the only thing I am left with is the wire coming from the solenoid into the cab to activate my system. I just cannot bring myself to some cheap button or toggle in my truck. The toggle I will use to switch back and fourth will be hidden and only switched when need be. Thanks and I will be adding some great photo shortly with videos

thanks

thats what were here for!!!