Looking up the owner's manual for a LT1046 shows that the correct snow thrower would be 190-032-101.
Looking up the manual for 190-341-100 says that it is for 2000 Series Cubs.
Looking up the manual for 190-032-101 and comparing to 190-341-101 shows they are not even close.
LT1046 is vertical motor and requires an undercarriage assembly to drive the auger,
2000 series Cubs are horizontal motors.
You can look it all up here....
http://manuals.mtdproducts.com/mtd/Public.do
(hint-put in 12345 for serial numbers)