Well this proves I am a complete noob. Short: I can not use this for the salt level indicator ?

Santa brought me a ESP-WROOM-32 because I would like to make a salt-level-indicator. I thought I could easily follow the instructions found here https://adonno.com/salt-level-sensor/ But : I cannot find a 5 volts output and whats more confusing ....my esp has two rows of pin holes on both sides :o :...