Tiny, short signal paths and each unit can be mounted with the regulator's metal side to a heat sink or to the side of the chassis. I didn't anticipate much heat for my application so didn't bother. You must mount the jack through the panel before soldering the rest of it to the jack, this is just for the purposes of the pic.

On the left you can see the two leads coming off the rectangular rectifier chip. Solder the leads coming from the transformer to these. They are very fragile but even after breaking a few off I was still able to solder the wire leads to the little nub that was left.


It's important to use plastic jacks, you don't want this part of the circuit touching the chassis as far as I know.