I don't remember actually. I was staying in Montparnasse so the 14th. Was 1 Euro wherever it was. Might've been this one: https://maps.app.goo.gl/5vPoD7jM3ELyP6gL7

And it's not this other one on the same street, cause this was free https://maps.app.goo.gl/Firjcsabthu8DHtQ6