The PHILCO Phorum

I am tasked with installing an auxiliary input for a Philco 41-290.  It will be a simple 1/4" switched jack.  The question is where would you break the circuit to wire in the 1/4" jack?  I would like to control the volume with the front knob.

I have attached the schematic.

Thanks!

Break the connection @ the blue wire, #38 and #39.  Audio input connected @ left of #38.

Awesome!  That's where I was thinking.  Just wanted to be sure.

Thank you!