IG-18 THD Mod Question

Hello,

I picked up an IG-18 audio signal generator and am applying the THD mod available from HeathKit. I cannot figure out where to connect the VCC wire. The instructions are here: http://www.d8apro.com/IGA-18-1.pdf The VCC arrow seems to just be pointing to a blank spot on the wave generator board. My guess is to connect it to "A" in the upper right corner but would appreciate if someone could confirm or correct. Thank you.