Example: $2$

Find the value of RL for maximum power transfer in the following circuit and Find the maximum power. In this question I understood the open circuit part but was confused with the short circuit part of the solving, how do we know how we redraw the circuit when we short circuit it$,$ what do we remove, and what do we add to make a new circuit that is redrawed to fit our addition of a shorted circuit. I used nodel analysis, i$\text{'}$d like to keep it incoperated into the answer. Thank you for your time, its much appreciated