Definitely Jupiter
Of course you meant 3 am CST... I live in that time zone, too. Jupiter is the brightest object in the east at that time, by far.
Do you know how to recognize Leo? That is, the "backwards question mark" with Regulus, the bright B-type star serving as the dot at the question mark's base. Jupiter is east of Regulus, and approximately thirty times as bright (that is, mag ~ -2 vs. +1.35 for Regulus).
Saturn is closer to overhead, near Castor and Pollux (Gemini), east of the Orion/Taurus complex ... and more recognizably yellow.
I use, and recommend, a shareware planetarium program called CyberSky.
