The first pic shows it connected to a short. In terms of the breadboard.
So, you have 3 pins. Put the pot about 75% of it's rotation. Start measuring. Suppose the pot is 1K.
Two pins will show 1K, two will show about 250 and two will show 750.
The 1K is the ends of the pot. The same as a 1K resistor. The wiper will be the common pin to 250 and 750.
It's "customary" in real circuit design that the wiper and an end be connected together when it's used as a two terminal device. This prevents some nasty things that can happen, but it's not required for breadboarding.
Put two wires into your breadboard and connect to an ohmmeter to make sure you understand how the breadboard and pot work. I believe if you did that with the way you have inserted your pot, there would be a short.
One company has now started to make the breadboards transparent.