After lots of research, I bought a Renogy 100W suitcase WITHOUT controller (on Amazon). It comes with MC4 connectors, and I got 20 foot Renogy extension cables. This way I can mount my controller near the battery, as recommended by the solar guys. For the battery end, I got a one foot cable with ring terminals, a fuse, and Andersen Powerpole connectors. I ordered a custom cable from West Mountain Radio, but this link is close to what I got: https://powerwerx.com/ring-terminal-...fuses-12-gauge
. This cable sticks a few inches out the back of the battery box, and I just cover the Powerpole connector when not in use with a simple dust cap cover they make. My controller sits on the outside of the battery box when in use, with a short MC4 cable to the solar panel extension cables, and a short Powerpole cable to the battery. Easy to hook up and disconnect, and protected from weather. Works great.