Drive belt on Zanussi TD265 tumble drier has snapped. How is a new belt fit?

RE>.ZANUSSI TUMBLE DRYER TD265.FITTING NEW BELT.
Hello to all,
Just did a search for any repair info. on my dryer,and found
this site, I have the same dryer, and have fitted 2 belts on it in the past7 years,but can't remember fitting it around a tension wheel, only the front of the drum & around the motor (top right),
The problem i have is a slight whining/squealing noise & it's gradually got louder over the past 2 years,iv'e alway's
thought it is what looks like a rear center bearing,
any help would be much appreciated,
THANKS,
JOHN.
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