The OEM top triple clamp has holes on each side, the OEM clip-ons are threaded directly underneath so a bolt can go right into it. With aftermarket clip-ons there is no threaded part there so you'll need a nut on the underside.I want to copy what you did. What do mean by “Also with aftermarket clip ons, you’ll need to add a nut on the bottom if triple.”
M6 bolts from AmazonCan you share a link to the parts you used? Please and thank you.