Engine numbers

Hi, all. I,m new on here and do have a question. I was given what I think is a 1979 kz1000 engine. Where would the engine numbers be, having a hard time finding them. I am building a "gokart" around the engine and do not want to go too far till I can find the year and get a electrical diagram.
Thanks all, I will keep you posted on the project if I can ever get this engine to run. I have enclosed a pic of my last project.

Good Day Snerff! Look at the right side of the motor, beneath carb 4, there will be a small raised rectangle with a series embossed on it. There ya go.

Thanks for the reply, I found them, I now need to look up the numbers to figure out the year. KZT00AE004438
Thanks again, sorry about the 4 post, I was trying to edit and messed up.

Year & Model '77 KZ1000-A1
Engine No. Range KZTOOAE000101 - 41170

Info found at Zedder zedder.com/Info/77%20KZ1000-A1.htm

Thanks for all the info. I will send pictures as I progress and get the engine wired.