Those are perfectly acceptable and normal for getting a tq wrench on a nut when you cannot use a socket. Care must be taken (if you care about accurate torque) to keep the open end of the wrench at a 90 degree angle to the head of a torque wrench, If it is at 0 degrees, as in the top picture, you are increasing the moment arm of the wrench. If it is at 180 degrees, you are decreasing the moment arm (see how the open part of the wrench is forward of the pivot ie:extension?)
Sets like these (except by snap-on) is what I used when turning wrenches on aircraft...
https://www.amazon.com/Stanley-Proto-J5100-Torque-Adapter/dp/B001HWEAAGThanks. Those Stanley adapters are like the crow foot ones but basically act as a box end so it would apply pressure more uniformly around the nut. In addition to being tight and hard to reach, the nut isn't particularly hard. I used my largest adjustable wrench which only touches two sides to start to loosen it and the leading edges where the force was applied started to deform slightly.
I'm thinking that 47 ft/lbs is not critical but a reasonable or suggested amount of tightness, the nut and bolt aren't parts that are going to break at 50 or come loose at 45.
