The EU-103 2 Tier cash drawer combines 2 independent cash drawer assemblies into one assembly. Each drawer can be opened independently using printer interface adapter that splits the drawer driver signal from a single RJ-11 drawer connector on the back of your receipt printer into two separate drawer cables. Your POS software controls which drawer opens.
Step One offers this adapter cable as part number "RJ-Y-Cable Epson"

EU-103 2 Tier Cash Drawer

Interface	connects to your receipt printer
Construction	All Steel Construction
Color	Black or Off-White
Size	16.54" (w) x 16.75" (l) x 6.125" (h)
Till Insert	8 coin, 5 bill ABS money tray
Lock Assembly	Center Lock--Manual Release, Electronic Release, Drawer Lock
Warranty	2 Year