Testing a used FS-iA6B

[jakepaul420]

Hi! I'm buying a used Flysky i6x with an FS-iA6B receiver. I need to test every channel, but I only have one servo, two 18650 li-ion batteries with a holder (7.3V), and a 5V power bank with two wires coming out of it. I don't have an ESC or any fancy connectors (other than female-female jumpers).

Could someone please explain (very simply please ) how to do the wiring to test each channel?