Sidechain input overbridge


can somebody explain me about sidechain input .overbridge

for exampe : i want the played audio on my tr 08 come through the rytm to add some distortion or reverb

after reading the manual about sidechain input i think this is possible but i dont really know how to route it or setup from my tr 08 to my rytm and how to set it up in overbridge ?

my apoligies for the noob question but i am here for learning so don’t shoot me

are there any good links for it to see how this works