Display-O-Tron Hat + Speaker PHat

Hello everyone,

Before soldering everywhere, id’like some confirmation on what are the GPIOs on top of the dothat (because it’s easier to solder there than the back of the PiZero).

Besides I2C and 5V, the Speaker PHat needs pins 18, 19 and 21 (https://pinout.xyz/pinout/speaker_phat).
On the top part of the dothat, there is “PWM” which i suppose is pin 18, pin 19 explicitly set and “SCLK” which could be pin 21.
Is that the case (because pin 11 is also SCLK and is used by the dothat )?

Thanks ! :)