How to Specify a Custom Chat GPT Agent in Clay API Integration

Hey guys . I have a custom chat GPT agent with my company's case studies, ICP, our value proposition etc etc and I was wondering when linking my own API in clay - How do I make sure it is using this specific trained agent ? I have a 2nd seperate one trained on. the messaging for specific personas and which social proof to include in that context etc - How can I specify which custom agent clay will use in the column ?