Diagnose and repair water leak on G37S coupe floor mats. Sunroof drain or Door seal leak?

G37 door seal and sunroof leak repair.
Diagnose and repair leak on G37S coupe. Sunroof drain or Door seal leak?
Black silicone sealant was used for the repair.
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Items needed:
Black silicone sealant
Flat Screw Driver
Water hose
Masking tape
Replacement upper door seals are expensive.
I looked up the upper door seal price and it looks like they sell for about $280 before shipping on a few Infiniti websites. Part number: 76861-JL001