Huh, weird. I’ve never seen a jack like that before. All mine have all five terminals the same (with holes). I can see how you’d make that assumption, though even with that assumption you’d have to make a further guess as to which way around to make the connection.
Anyway, the terminal on the beveled corner is sleeve, and from there clockwise: Ring switch, ring, tip, tip switch. Normally sleeve connects to ground, tip connects to signal, tip switch to nothing unless some normalization is needed, and ring and ring switch to nothing unless it’s for a stereo signal.