I2C pins: 4, 5 (lower right in picture)
SHT30 voltage (check datasheet): 2.4 - 5.5V
wiring:
+-------+
+-----\ | SDA 4 ----- Yellow ----
| +-+ ----+ GND 3 ----- Black ----
| +-+ ----+ +5V 2 ----- Red ----
+-----/ | SCL 1 ----- White ----
+-------+