When I say the base, I mean the bottom side according to that layout. On that layout, the bottom of the 1.5k shows a line going down to the lowest pin on the input jack. They need to connect there. Then it shows a line going from there to ground. Also it shows the center pin on the input connected to the center pin of the boost switch, which are both connected to the bottom pin of the input. All of these should be connected to ground.