Ohhhhh, ok. gotcha. The BMS to work correctly and fully protect the battery is always between the battery and everything else. So yes, it would be in between
Solar->Controller->BMS->Battery
Inverter->BMS->Battery
So you would have a common bus "after" the BMS shunt monitoring. And for further protection, there'd be a breaker between the shunt and the bus. Actually there'd be two. One between the bus and charger, and one between the bus and inverter. You don't want the charger and inverter being directly connected for full safety/automation reasons.
When they made this device, or the documentations, they were designing it for Lead Acid batteries. LA's don't require a BMS to function correctly. They inherently will stay in balance for the most part. And when one dies, it isn't as bad as it can be with lithium.
When the dump load is engaged, I think the charge controller automatically disconnects charging the battery first. It's not feeding both at the same time, though it does continue to monitor the battery SoC.
As for freespinning, I think the charge controller should control that as well. It'll auto switch to load diverting when the battery is fully charged or if it's not there at all.
For switching, you would keep the dump load engaged until the wind turbine is kept from spinning. And generally speaking, you wouldn't take the turbine down in high winds anyways, dangerous to do so.
"When the batteries reach the trip point, the relays are activated which opens the normally closed circuit from the solar panels to the batteries. As this same, the diversion load is activated, allowing the turbine to remain running without overcharging the batteries"
"Disconnect the battery from the controller before servicing"