Hi Lin,
You need a "Hook" type adaptor, I suspect it is the one on the bottom right, but it is only shown in profile in your picture.
The hook of the arm either goes inside the adaptor, as shown on my wiper "A" with a grey standard Hook connector,
or if a "U" type adaptor is used, , universal wiper "B" then the U goes inside the Hook of the arm.
I suspect that your bottom right adaptor is possibly the one, in which case it should clip on the blade cross bar, and the Hook of the arm should either locate inside it, or around it. best to try the adaptor on its own on the arm to see if it will fit
I hope this is of some help, if not send some more pictures of the adaptors from another angle.
Keep well, and good luck
Paul
