How does solar play with a battery disconnect!!??

Thanks to all for your replies. Main reason I asked was that a wiring diag I saw for a trailer looked like the opt solar wires would be directly connected to the batteries. Looking closer (a fuzzy pdf!!) I can see that they are on the batt side of the cut off switch. So my question has been answered.

Further reading here kinda gives me the idea that a switch in the output of the solar panel is not a good idea either!! ????