Can you jump a 12V plane battery with a car?

I had a 172 that had a plug in port for jumping the plane,also sportys did make a set of jumpers with the plug attached. Recently I had to use a jump g box at a rural airport.
 
If I have to jump start my Cessna 182, then I need to remove the plug and install the face plate on the side of the plane.

Will there be less prop blast if I pull the prop back to low rpm? If I do that is there any risk of damage to the engine?
 
For less prop blast you want the control forward for less pitch.
 
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