I was able to solder all three wires neatly to the AIO in less than a minute by using this simple hack.
Reverse clamp tweezers I think it’s what the clamp is called.

   I should have taken more pictures showing the wires before trimming them to length but picture should explain what I did.
  Wires will fit into slots on pads before trimming to length and when it’s time to solder the wires will not move around then when you flow solder for the last time use some resin to make them look nice smooth and shiny.
  
  

Nice trick. I’ve got some normally closed tweezers, I’m gonna have to put them to use and try this next time.

Yes, I have several different "styles" of the normally closed tweezers
and use them all the time. In addition to using them as clamps, they
are great for picking up small things that my fingers simply can not
grasp.

I freely admit to avoiding boards with those slots on them, for the very reason of soldering stuff to them.

(08-Jan-2023, 03:39 AM)Pathfinder075 Wrote: I freely admit to avoiding boards with those slots on them, for the very reason of soldering stuff to them.

I actually go for those because I like how I can just press the wire into the pad. Makes it super easy!

I agree with Suros. The semi-circle cut out "pads" are super easy to solder.
When tinning them, the solder just fills up the hole. {I stand the board on
it's edge so the cutouts are like alleys that fill up and hold the solder}. 
Place a wire over the pad, place the soldering iron on top, very light pressure, 
when the solder melts, the wire sinks down into the recess and done.

By the way, I always solder motor wires without the FC mounted. So,
I stand the board up on its edge so that the cutouts are down with the
wire on top. The board is secured in that blue tac putty stuff. When the
solder begins to melt, the wire drops right into the cutout. Super easy. 
I will take cutout motor pad over flat pads any day.

Side note. you can make the exposed wire a bit long if you want and 
trim it after it is soldered.