To hold a wheel on a 5000# vehicle? Not for me.
Also, I would be concerned about bearing damage using a hammer.
There are several different tools for this, maybe rentable.
My bumper was free, but it was missing the plastic covers around the recovery points. The four brackets were needed for the sensors. The sensors I ordered from amazon didn't work. The ones that did work are NU5Z-15K859-DG. Maybe your sensors aren't flush because they don't fit (not angled)...
No turn signal. Ford calls it a spot light. You will need the correct switch panel to operate them. Intended for off road, they only work up to 5mph. There are aftermarket units that have turn indicators.
I would never use a Bronco hitch as a recovery point. It mounts to a cross beam that is full of holes. This is the main reason the tow capacity is so low. Hitches on other vehicles mount to the stronger side rails.
Your meter goes between the two connectors. Use a wire between the connectors for the other leg. The factory fog is the load.
As I said earlier, " Won't tell you the max available, but may raise the bar over the SS3. "