Your meter looks nice, but the probes have half inch of exposed metal. It is very easy for a probe to slip off an item being tested while your trying to hold two of them and look at the reading on the meter. Often, a bit of grease or oil or protective substance sit's invisibly on the surface your probing. Your there looking at the meters unsteady reading, having to jab the probes in harder and wiggle, Watching to see if the reading settles. Risky business with ribbon cable spacing. Even resting your hand to give the precision of a pencil, them connections are still a probes width apart if you slip badly. Your probe can span half inch. Sending molten metal flying.
What you should do is tape up the exposed prongs except for the tinyest bit at the pointy end. Just leaving enough exposed to be able to make a connection, but not enough to touch two at once. With your probes taped, you might find it impossible to short a cell. Making the job quite pleasant, rather than death defying.
Eye protection is well worth a thought. The black will come off your hand over time. The carpet can be extinguished. Your eyes are not worth the risk. You need them to put the carpet out.
p.s I think I took an hour to write this :?