Where is the form and data sent from the Bitrix website?

Question

1C-Bitrix

In the popup in the form in the action attribute there is a pound sign "#" this is all in Bitrix, where can I see where the data goes? In the same place, instead of a lattice, there should be something like action = "send.php" where can I find the settings for these pop-up windows in Bitrix? You need to change the mail where the data goes.