sorry for this response as it is very novice but this was the first carb i have opened up/rebuilt. i have always had someone else help with the carb stuff so... what is the air horn? also i always say im from missouri, show me... im not up on my terminology yet.
thank you for the help!
Not a problem. The air horn is the top part of the carb, the float bowl is middle part of the carb and throttle body is the bottom part of the carb. So, you will have three main pieces when taken apart. The throttle position sensor or TPS, is located on the driver side front of the carb. Should be a white or black electrical plug sticking out, before you took it apart.
Here is the part you need help on, that you don't know where it goes. I am not a 100% sure, but it is the only part I can think of it being.