Hi James, Thank you for sharing your feedback. We’re sorry to hear that the electrical connection on the mirror did not match your vehicle and that no installation diagram was included. The part is listed to fit the 1996 Lincoln Town Car Executive with power adjust and heated features, but we understand there may be factory variations that can affect compatibility. We’ve reached out via email to verify the original mirror's specifications and confirm whether the part was installed. If it hasn’t been installed, we’ll be happy to help set up a return. While a manual is not currently available, we’re raising this concern with our supplier to support easier installations moving forward. We appreciate your input and are committed to making this right.