Here is a switchbox I made for my A/C Blower Fan for my garage. The switch I used was a 3 speed switch to take advantage of the existing wiring. It has worked out excellent for me.

Note: I used PETG for heat resistance since I am in SE Texas. The file will require support on overhangs.

Feel free to modify this file, but please link back to this location.

I used this switch from Amazon (https://www.amazon.com/gp/product/B09H46H8Z8/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1)

Enjoy!!