Winterizing. Just looking for some clarifications...

You should have low point drain valves to drain the line from the tank to the pump. I'd use the pump to drain the tank as much as possible then open the low point drains and dump the holding tanks. Use the hot water bypass valves to make sure the antifreeze doesn't go in the hot water heater. Use the identified AF suction hose to suck AF in and run through each faucet hot and cold and the toilet. Pour a little extra down the sink drains.