OBD power/Remote Start problem; Powering Dashcam/Accessories

Howdy! May I impose upon the community for some feedback/help - please, let me know if I've missed anything here or if my assumptions are incorrect:

I recently purchased an

$15 REARMASTER Universal OBD Power Cable for Dash Camera,24 Hours Surveillance/Acc Mode with Switch Button(Mini USB Port)

aftermarket OBD to Mini-USB cable (Amazon) to power

3 Channel Dash Cam, iiwey Full HD 1080P Front and Rear Inside Three Way Dash Camera for Cars, IR Night Vision, 2.45" IPS Screen, 24H Parking Monitor, Motion Detection for Uber Taxi Driver

this dashcam (also Amazon), but immediately encountered trouble using the Remote Start feature via my key-fob. The dealership told me that the OBD power source, since it was drawing constant power was interfering with the Remote Start system. I get the impression that the antenna for the Remote Start is in the OBD sensor; can anyone confirm or know anything about this? Sure enough, if I unplug from the OBD, the Remote Start works perfectly.

1. Other than using the OBD port as a source of power, I was unable to find any fuses or another readily available constant source of power (since I want the dashcam to have power all the time) in the cabin. This leads me to believe that I will need/should just run power for the dashcam directly to the battery.

2. In so doing, I plan to add a

$18 BlueFire 12 Way Blade Fuse Box Fuse Box Holder Standard Circuit Fuse Holder Box Block with LED Light Indication & Protection Cover for Car Boat Marine Trike Car Truck Vehicle SUV Yacht RV

fusebox like this one for minor connections; namely:

1. Dashcam
2. Chase rack floodlights
3. Chase rack spotlights
4. Amber fog lights
5. Rear flood/spotlight
6. Driver side floodlight
7. Passenger side floodlight

3. Since the winch requires a higher gauge cable than the other accessories, I assume this means it cannot be run off of one of those same fuses (example). I eventually plan to add

$35 Blue Sea Systems 9003E e-Series Battery Switch, On/Off, Red

this Blue Sea Systems switch to connect the front bumper's winch directly to the battery. I will therefore need to swap the stock battery terminal leads for

SUNMORN Battery Terminal Connectors, 1/0 AWG 2 AWG 4 AWG 6 AWG 8 AWG Battery Terminals, Positive and Negative (+/-)(1 Pair) for SAE/DIN/EN Tapered Top Post, with Washers Protector Fiber (Gold)

multi-cable terminal leads like these; yes?

So then, I think, the end state I am seeking should be something like this (feel free to ridicule the quality of my drawing skills):

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