I run the exact same boxes. In the sealed box, I keep my recovery gear
snatch block
snatch strap
tree saver
2 additional shackles
wrenches (7piece)
ratchet straps
screw drivers
small 3/8 socket set
dead blow hammer
ballpeen hammer
tire plug kit
survival axe/shovel kit.

First aid basket: (in basket)
rain coat
poncho
large all weather emergency blanket
2 flashlights with flash mode
cold weather gloves
cold weather face mask
box of hot hands

First aid bag:
foil emergency blanket
band-aids
4x4 trauma pads
5x9 trauma pads
10x20 trauma pad
tourniquet
Israeli bandage
4" kling
6" kling
tape
3 triangle wraps
sam splint
6" board
sterile water
Benadryl
aspirin
Tylenol
Imodium AD
tums
cold packs
BP cuff
stethoscope

I have other boxes as well but set up for camping