1. I'm going to replace the existing aged input/output connectors board with a DIY board stuffed with 18 (i.e. 9 pairs, same as the existing board) female RCA connector jacks. Since each RCA jack has its own +ve and -ve(Gnd)terminals, do I have to connect all the ground terminals of each channel with bare (or insulated) wires the way similar to those on the old board?
2. There used to have connection from the selector switch to the L & R ground terminals next to socket #1 of the input/output connectors board - from lug #3 of wafers A & C of selector switch. When this old switch is replaced by a new 2-pole 6-position switch, where should these ground connections go? Or are they no long required for the new switch?