Hi relinquish69,
I figured out the remaining connections! Based on your snapshots, the tone pot is connected to the level pot by a white wire.
After soldering/desoldering/testing the pedal for around 3 hrs i finally got right. My ds-1 is alive again! Oh man, I really missed the sound of this thing. Of course, I still hate the annoying noise but the sustain is awesome.
Thanks relinquish69 for helping me out.