Creation of multisig 2 of 3 addresses with trusted coins

[SebastianJu]

I noticed that the window showing the transaction details before signing does not show that the trusted coin addresses are multisig addresses and how many signers are needed. The system  works though, no question.

But what I would like to know is how are the addresses created. I mean public keys are needed. Electrum creates two and receives one from trusted coins. So there is no way to meddle in any way with the amount of keys and needed signers I guess.

Only want to confirm.