Please see below for the pinout with an Arduino Mega and Adafruits Arduino Library for our 64x32 Matrix RGB LED displays:

Arduino Mega Pinout:

Mega Pin	IDC Pin left	IDC Pin right	Mega Pin
24	R1	G1	25
26	B1	GND	GND
27	R2	G2	28
29	B2	GND	GND
A0	A	B	A1
A2	C	D	A3
11	CLK	LAT	10
9	OE	GND	GND