You need a 3750 switch with SFP Ports for the fiber.
Multimode cable uses SX, you need: 1000BaseSX SFP Model: GLC-SX-MM for the 3750 switch with SFP ports
To connect the switches in the best way possible, use the Stackwise Cable. Connect both stack ports to both switches for full duplex operation.
CCIE 26175
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