Looks like a big enough part that it should be doing something useful under there. 
Only thing I know would be to enter your exact Sears XXX.XXXXX model number into Sears Parts Direct and look over the parts exploded views and see if anything looks like it in the pictures.
http://www.searspartsdirect.com/partsdirect/index.action
Only thing I know would be to enter your exact Sears XXX.XXXXX model number into Sears Parts Direct and look over the parts exploded views and see if anything looks like it in the pictures.
http://www.searspartsdirect.com/partsdirect/index.action