I'm trying to convert the left circuit to the one on the right using Thevenin's theorem, but I'm not understanding how this is done for this circuit.
From my understanding of Thevenin's theorem:
(1)You disconnect a load resistor R_{L} and calculate the open circuit voltage v_{oc} where the resistor would be.
(2)Then short the voltage source and find the thevenin resistance R_{TH}.
(3)Replace the original voltage source with v_{oc} in series with the thevenin resistance R_{TH} connected to the load resistor R_{L}.
In the below picture, what is the load resistance that is removed and what are the terminals where V_{oc} is measured? How specifically is +5 volts found to be the open circuit voltage? How specifically is the thevenin resistance calculated in this image?