Outlander Carb Question

Hello,
I have attached a picture of an extra carb i bought on ebay. I think i got it for a good price. However i think that it is missing some pieces. Parts diagram shows a heater element that is suppose to go in the hole with the brass nut on the left. Is this needed? What does it do? Also the hole on the right appears to be empty. I cant tell from the parts diagram if it is suppose to be empty or if parts go in there. My quad is up at the cabin 3 hrs away. Looking to clean and rebuild this without going up there. Its from a 2004 330 Outty.
Thanks for the help!

Attached Images
File Type: jpeg image.jpeg (1.67 MB)