WHERE IN THE CODE DOES IT SAY THE PROPER WAY TO ATTACH AN AUXILLARY GUTTER TO A MAIN PANEL. I HAVE AN 800 AMP MAIN PANEL WITH A 12x12 GUTTER ATTACHED AND THE SUB PANELS SETTING ON TOP OF THE GUTTER. I CUT A 10x10 HOLE THROUGH THE END OF THE GUTTER AND PANEL, BOLTED THE TWO TOGETHER AND PUT RUBBER MATERIAL ON THE EDGES TO PROTECT THE CONDUCTORS. THE INSPECTOR DOESN'T LIKE IT BUT CAN'T TELL WHERE IT IS IN VIOLATION.