Getting close!
I’m sure you’re busy.
Adjusting the brakes is easy. And presume you didn’t have to adjust them down to remove the drums. Doesn’t hurt to get them just right though.
In your pic, bottom of the brakes in the middle the piece that connect between the 2 pads has a little “star wheel”. Official term lol. And the backing plate should have a knockout with a rubber plug in it to access it when the drum is on.
Spin the wheel to thread the adjuster out or in. Make sure you know which direction to go. Thread it out a bit until the drum slides over tight, back it off a little. Put drum on. Adjust out until drum drags a little on the pads. Adjust back in a little until it just spins free.
Or if your brakes worked well to begin with and you didn’t adjust any, they are fine.
On that note, snow and ice = go easy on the trailer brake gain to prevent the wheels locking up prematurely.
