PSB to GND
RST to Digital Pin 5
E to Digital Pin 4
R/W to digital pin 3
RS to digital pin 2
Other pins as described in the datasheet or the controller manual of the ST7920.
Then use:
U8GLIB_ST7920_128X64 u8g(4, 3, 2, U8G_PIN_NONE, 5 );
Pin numbers above are only suggestions, you may use any valid digital pin.
Oliver