I think that yaazz has the best Idea with the cable, it is simple, easy, and cheap
just take apart the wiimote and drill some holes, then attach the cable
you could even go as far as having an auto retracting cable with light tention so it doesn't interfere with gameplay
If you were planning on using a nunchuk as well, you could use the plastic loop in the connector and use zip ties to connect it to the wiimote