OpenCart 3 redirect Page From Dropdown

I m new in OpenCart. I m using Version = 3.0.2.0.

In Product Detail Page there is a drop-down color. I added options from admin panel. I do not write any code in the backend. When changing the dropdown value. it redirects to there page.

For Example : https://www.opencart.com/index.php?rout ... /extension
In this URL When changing on the OpenCart version the page in change.

I want the same functionality on the Product Detail page when clicking on the white color the page in a redirect to white phone page.

Black Phone Link: http://localhost/OpenCart/upload/index. ... duct_id=40

white Phone Link: http://localhost/OpenCart/upload/index. ... duct_id=50

This extension may be useful: https://www.opencart.com/index.php?rout ... n_id=27832