Carpet attachment won't turn on?

I took apart my Aerus Lux 7000 to fix the on/off button on the top, no problem, had a little trouble getting it all to line up correctly to put it back together, machine turned on, but carpet attachment won't, pressed reset, nothing, tried the mini furniture attachment nothing, took it apart again, there is an unattached wire, can't figure out where it goes, it's a little tight to go all the way to the back, can you help, can't really afford the service repair, out of work, trying to do on my own