My 5400 only has one ADB port on the back and I want to attach a ADB gamepad. Until now I did this by disconnecting the mouse from the keyboard, but as the keyboard on my Classic II has two ADB ports (apparently so you could attach the mouse for left or right-handed use) I was wondering if I could use it instead and have the mouse and gamepad attached to either port.

I just want to be sure there's no danger of overloading or frying anything before I try this