We need to replace the belt on our Hoover U4581-910. We bought a new belt and removed the "plastic grill" piece. The broken belt was attached to the brush. We removed & cleaned the brush and want to attach the new belt--- but we cannot find spindle on the motor to attach the other end to. There is plastic covering the motor -- and we see no way to remove it and/or get in there. We would much rather repair this good ol' vacuum rather than buy a cheap new one. Please help!