the wiimote is connected via bluetooth and the classic controller has to be plugged to the wiimote.without wiimote or adaptator (if it exists) you can't. I don't know if there are homebrews to connect "every" gamepads
U may need titan one or cronus max, usb devices (that support bluetooth via additional isb dongle) that converts any input to any output (as xbox controllers, ds4..)
You must pair the wiimote with the titan one usb dongle (you also must provide an usb bluetooth dongle).
Titan one can convert various input in various output in real time, so you can remap wiimote buttons and gyroscope to simulate a psmove or even ds3 (at least partially as ds 3 has more buttons)
Of course this will work even on ofw but you cannot power on the console using titan one (because titan one has no power to send input via usb when the console is turned off - at least on ps3)