I’ve completed the mission spiking the guns, but is there a warboard here or safehouse area before I leave?
There are only warboards in the 7 command bunkers from the base game and the Bjorntunet hotel and Ringfort from the 2 story DLCs.
There isn’t any safehouse in that location, but you can figure that out yourself by looking at your compass at the top of the screen. Whenever there’s a safehouse nearby an icon will show up there and guide you to it. If the compass is empty then there’s none nearby.