I would split my forces into three groups.
Group A, would be 1/4 of the tanks, and would cut to the east, and move into factory to stay out of sight of the guns at windmill.
Group B, would be 1/2 of the tanks, and would push up the middle to harry the AT guns, and any german tanks. More of a delaying action.
Group C, would be the remainder of the tanks, and fast movers, read: jeeps and half tracks. They would push to Flak, and while the infantry was working on taking the flag, any tank and AT assets would move from the flag to positions to fire on the bridge area, and the rear of the german tanks that crossed.
After those two flags were taken, I'd consolidate my hold on them, then have the two groups north of the river work on getting windmill, while flak group stayed put and held on to it, and used its assets to try and supress the luftwaffe.