I can't tell you how many times I have had to fight the old brittle boards. They served their purpose for 40 to 50 years, now they are

burned badly. PLUS, they have no plated thru holes, no double sided traces, no silkscreen to tell what's what. I even have the wire colors on my boards. I use Nichicon quality capacitors as well. These have been heat and load tested

The mounting holes are now plated thru, with pads on the bottom to allow the ground to make contact, so the center black wire has a safety net.

For the 5 Vdc test point, simply make your wire longer, that solders into the red wire spot, and BAAM, there's your test point.

Each board was tested in my G-7700 for 1 whole day. I adjust mine to +5.05 Vdc. You may have to change that with your different models & loads. There is a nice Blue Potentiometer for said adjustment.

If it is going into a G-5700, hook the wires up as shown, ( diagram included) the bridge will take DC or AC and get the same results.

Also now you have an adjustment, where the 5700 does not offer this feature, I do.

I sell this board on eBay as a blank version, or this turnkey solder and play board. (Fully Tested)