If the suitcase you plan to buy has a controller, just connect a short pigtail directly to your battery and run the solar directly to that. If you can find an old plastic film container, pill bottle, or similar, punch a hole through the bottom of the canister and run the wires from the inside of the container so the connector can hide inside. Run the bare wires sticking out of the canister to the battery. Cap the canister when not connected to solar for a water tight connection. FYI I get about 22 Ah from my 2 x 50 watt suitcase panel on a full sun day. I use up to 40 ft of 10 gauge wire when chasing the sun in a campground.
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2021 2205S Rockwood Minilite
2019 F 150 Lariat 3.5 Eco Fx4 Max Tow
Equal-i-zer WDH, 1809 lb payload
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