Wiring to potentiometer

[Champ81]

For the potentiometers in a bias circuit there can be about three leads that go into one lug or post. I noticed under closer to the pot there are small holes that can fit a resistor or capacitor leads. I tried soldering to those. I'm not sure if it's too close to the track that it's not a good place to solder as it might damage the track?  Is this what anyone else does for more "space" to connect leads or wires?  I also noticed that pots where I did solder to those small holes the resistance was reading over in Megs when the pot was rated at 25K. The other pots don't do this.  Even after I removed the resistor leads for example.