How do I adjust rear brakes?

Assuming you have drums in the rear which appear to be the only option on this vehicle, then this is done through the adjuster that you can access from the backing plate.

Here is a guide that will help with how to replace them, and it shows how to adjust them as well:

https://www.2carpros.com/articles/how-to-replace-rear-brake-shoes-and-drums

Also, I am attaching the info below that will show how to replace them and the location of the adjuster so that you can access this from the backing plate.

Please run through this and let us know what other questions you have. Thanks