Hello, I have two of these power supplies. These have the Lenovo FRU-NR 45N0554. Both have a 3 pin cable. I believe this is standard for 135 watts, which could indicate that the picture is wrong, or that you can't see the top bulge of the third pole very well.
Google, first page, third link (at least for me):
https://support.lenovo.com/ch...
"Compatible with ThinkPad laptops with rectangular "slim tip" common power plug".
So if your notebook also has the rectangular port and not the round one, everything should be OK.