How do I list my installation services in Amazon?

We are a local car audio shop that deals daily with customers who bought their radios online and just want us to install it.

So I figured hey why don’t I look into listing my installation services as a check out option for products customers purchase on Amazon? Kinda of like when you purchase a tv mounting bracket and it offers installation services.

I read through the seller central resources and there’s no way to list it.