Wiring 2 separate PIR’s to an LED Floodlight
Yes, that looks about right. You are paralleling the motion sensors, and connecting the light to the combined switched output (L' on your diagram) of the motion sensor. If either gets triggered, then the light will turn on.

See this DIY question for some more info. https://diy.stackexchange.com/questions/80490/multiple-motion-detectors-wired-together