Start by obtaining an API key from the IP2WHOIS website, which is necessary for accessing their API. Visit the IP2WHOIS website and sign up or log in to your account to generate an API key. Note this key as it will be used for authentication in your requests.

Prepare your local environment to make HTTP requests and handle data. You can use programming languages such as Python with libraries like `requests` for making HTTP requests and `csv` for handling CSV files.

Use the API key to make a GET request to the IP2WHOIS API endpoint. Construct the request URL with the necessary parameters, such as the IP address you wish to query. Here is a simple example in Python:
```python
import requests

api_key = 'YOUR_API_KEY'
ip_address = '8.8.8.8'
url = f"https://api.ip2whois.com/v2?key={api_key}&ip={ip_address}"

response = requests.get(url)
data = response.json()
```

Once you receive the response, parse the JSON data to extract the information you need. This might include fields like the domain name, registrar, contact information, etc. Check the API documentation for the structure of the response.

Organize the extracted data into a format suitable for CSV. Create a list of dictionaries where each dictionary represents a row in the CSV, with keys as column headers. For example:
```python
csv_data = [
{
'IP': data.get('ip'),
'Domain': data.get('domain'),
'Registrar': data.get('registrar'),
# Add other fields as required
}
]
```

Use the Python `csv` module to write the organized data to a CSV file. Specify your desired file name and use the dictionary keys as column headers:
```python
import csv

file_name = 'ip2whois_data.csv'
keys = csv_data[0].keys()

with open(file_name, 'w', newline='') as output_file:
dict_writer = csv.DictWriter(output_file, fieldnames=keys)
dict_writer.writeheader()
dict_writer.writerows(csv_data)
```

After writing the data to the CSV, open the file to verify the data is correctly formatted and complete. Make any necessary adjustments to the data extraction or writing process to ensure all required information is accurately captured and presented.

By following these steps, you can effectively transfer data from IP2WHOIS to a local CSV file without using any third-party connectors or integrations.