STM32F103RB

First of all forgive me as I am a beginner in embedded systems.

I am using a Nucleo STM32F103RB. I am trying to send a trigger signal from my STM to a FPGA card, by setting a GPIO pin of my STM but I am unsure about which pin to connect.

This is the code I use to drive my GPIO:

HAL_GPIO_WritePin(Trigger_GPIO_Port, Trigger_Pin, GPIO_PIN_SET);
//do something
HAL_GPIO_WritePin(Trigger_GPIO_Port, Trigger_Pin, GPIO_PIN_RESET);

with Trigger_GPIO_Port and Trigger_Pin being defined as follows:

#define Trigger_Pin GPIO_PIN_2
#define Trigger_GPIO_Port GPIOB

By using STMCube32 software I had the following picture:

So, I connected the PC9 pin of my board as the trigger by basing myself off the picture STM32Cube gave me.

Am I wrong in doing that? This doesn't seem to work... How can I simply send a trigger from my board?

Thank you for your help!