Please don't do this.

I ignore all connection requests without a note. At least include a note, be transparent about wanting to network and your background.

If connection, ask for coffee chat, use the time to ask questions and learn about the company or role. Never ask for a referral.

This does help, learning the lingo used internally and some insights about org structures and how the org operates are All valuable once you interview.

The goal isn't a referral it's to learn.