Installing Picade X HAT USB-C Speaker Wires

I’m having a hard time getting the speaker wires installed into the Pimoroni Picade X HAT USB-C into the SPKR terminals. The instructions say to “gently press the clips on the speaker terminals” but the wire doesn’t ever seem to “catch”. You can see where I’ve pressed too hard in the following picture.

Am I pressing the clips in the wrong area? I am pressing where there is a small divot on the white part of terminal. In fact I think I broke the terminal from pressing too hard. Can someone please help?