mongoose/docs/c-api/mg_http.h/mg_connect_ws_opt.md

title	decl_name	symbol_kind	signature
mg_connect_ws_opt()	mg_connect_ws_opt	func	struct mg_connection *mg_connect_ws_opt( struct mg_mgr *mgr, MG_CB(mg_event_handler_t ev_handler, void *user_data);

Helper function that creates an outbound WebSocket connection

Mostly identical to mg_connect_ws, but allows to provide extra parameters (for example, SSL parameters)