To connect with manual keys, you need to do the following steps:

1. Go to your WordPress Dashboard.

2. Go to "China Payments Plugin".

3. Click where it says "Click here". 

4. Go to and log in.

5. Click on Developers -> API keys.

6. Copy the Publishable key and the Secret key.

7. Paste them into the WordPress Dashboard.

8. Click on "Save Changes".