I follow Moritz Klein on youtube, he designs modular synths and etc. i want to build what he explains, in the game. some things are misunderstood or. example with his powersuply with a dc +xV-xV and ground he's drawing the negative pole of the capacitors directly to ground, wich ingame it says that is not allowed, i have to add a resistor. or it would be flat out short. what am i missing or doing wrong?

https://youtu.be/pQKN30Mzi2g