Got it !!!
Really appreciated help and very precious, so many thanks to all you here.
By the way, if another would reach my same issue, as following the letters and numbers, this is the fine sequence :
> 1 and 2 , exacly as shown in the pic, fit between K - L and M - J as an hamburger.
> 3 and 5 fit in exacly D and C, where then you can place E and F.
> 4 fit between N and K .
> 6 and 7 ,exacly as shown in the pic, must be placed in between A2 - B2 and D2 - C2, facing the opposite side of the saw-knife blade.
Many Thanks, great and fast help, no really words to expalin thankfulness.
Have nice time