Arduino connection to brainwave analyzing module
As per the datasheet you provided, it is quite straight forward.
It can be connected to RX (pin 0) and TX (pin 0) pins of the Arduino Uno.
But, the pins have to be crossed;

Arduino RX (0) &lt;> TGAM T (TX)

Arduino TX (1) &lt;> TGAM R (RX)

Arduino 3.3V &lt;> TGAM + (VCC)

Arduino GND &lt;> TGAM - (GND)

Good luck.