Go to https://inspector.vecha.in/, switch to testnet (on top-right), click add, add the above address and the ABI that you can find in the below section.
Run locally
You can deploy the contracts on your own or run the tests by using the public repo with the contracts at https://github.com/vechain/stargate-contracts. This resource contains all necessary files and instructions, allowing you to clone the repository, explore the smart contract code, and follow setup procedures step-by-step, allowing you to interact with the contracts on testnet or thor solo.