Throttle Assembly Help

So I am in the middle of restoring and updating my 78 KZ400C1 and have hit a snag.

I ordered This Throttle Assembly because I love the simplicity of it and flat black paint. BUT when I got it in I realized I have a problem. The two throttle cables that are currently on the bike have the same size nut on the end, and this throttle assembly has two different sizes.

Do yall have any advice as to if I can make this work in some way, or if I will need to return the assembly I have and order a new one. If so do yall know of any that are like it in their simplicity?

Thanks.

It's for a Honda. I'd send it back and get the right one. What's wrong with the one you have?
Steve

swest wrote: It's for a Honda. I'd send it back and get the right one. What's wrong with the one you have?
Steve

Nothing is necessarily wrong with it, I was just hoping to go with a much cleaner. And I don't need the kill switch controls on it.

That's up to you. Mine has the headlight switch and kill switch. I like it. I repainted the M/C after this pic.
Steve