If you're adding a battery box, this is one place it'll fit with fairly short cabling dropping down and out to the winch. I then tucked my dual battery charge controller behind the box with a BlueSea switch on top.
I mounted mine in front of the DS battery. I simply took some angle iron, welded a bracket to it, then bolted up the contactor. I then made custom cables that go down, out the DS headlight hole, under the rad, and over the bumper to the winch. Routing is pretty easy and I was able to run x4 1/0 cables this way.
That is my front solenoid.
Mounted on 3 point 2mm bracket. Screwed on original places.
Wires went into cab where socket is installed to prevent contacts from corrosion and to prevent control wire from be forgoten after winching.