Ohhh i found them, theyre an actual LFO shape xD i didnt realize…
I think that If you have a sidechain set up from a kick drum with a periodic rhythm then you can use the “sidechain” LFOs to accent the pumping from side chain compression. That is my guess.
The two Side Chain presets only emulate the sound of side chain compression — it isn’t true sidechaining. Set the frequency to 1/4 (standard kick timing), apply the LFO to the OSC level and value to your taste.