option1=value1 and option2=value2 are just templates, which you should replace with actual option-value pairs from https://octeract.gg/docs/octeract-engine-options/options-reference/. As an example, you could write
option octeract_options 'USE_PROBING=false OUTPUT_FREQUENCY=10';
All of the options for Octeract should be given together in one option statement, like in this example.