You should be able to work it out from this exploded diagram.
http://www.mymowerparts.com/pdf/McCulloch-Parts-Service-Repair-Manuals/McCulloch_Electric_Blowers_And_Blower_Vacs/McCulloch-33210-45-EAGER-BEAVER-I-BLOWER-VAC-335-08-93-to-Current-IPL-211788.pdf_
The suction tube comes off
The collection bag comes off
The blower tube goes on in place of the collection bag
3heh, September 2022