Follow up to above.
I'm currently wiring in my G900 with the Wolfbox hardwire kit. As a test I temporarily put the hardwire kit across the main battery with an inline multimeter set to measure current. Yellow to + and Black to -
During startup the G900 pulled 850 milliamps with the rear camera connected. After startup it stabilised at 800 milliamps.
That seems consistent with a device of this nature and the wire gauge used in the kit.
Unclear why Wolfbox recommend higher current circuits in the hardwire kit FAQ and include 15A fuses. That seems excessive.
@Chadd7 With this in mind it's unlikely that the 10 Amp limit on INT2 is causing your shut down issue, assuming you're not maxing out INT2 for another purpose.