UCC Value After Switching businesses

Hi, 

I'm having trouble with figuring out the " Unclaimed capital cost (UCC) at the beginning of 2023" my vehicle. 

I used my car for self-employment 2017- 2021 
Purchased new in 2017
UCC at beginning of 2021: 9,183.83
CCA for 2021 return: 
2,259.19


For year 2022 the business had no income or expenses and there was no 

"Motor vehicle expense (Business)" section of the return. 

For 2023, I had a separate business in which I used my vehicle for business purposes. How do I accurately calculate my UCC for the beginning of 2023? 

Also, I had two businesses in which I used my car, would I enter the same UCC value for both when I log the expenses? 

Your assistance is appreciated 🙂