[sdiy] Buchla 140 Pulser Question

[Romeo Fahl]

Referencing this schematic:

http://rubidium.dyndns.org/~magnus/synths/companies/buchla/Buchla_1400_1_200.jpg

I'm trying to match up the front panel components with the schematic,
and am finding that there are two switches that are unaccounted for

Can anyone tell me what S2 (2nd from the left) and S6 (closest to the right) do?

The panel layout can be seen here:

http://www.buchla.com/historical/b100/images/140_1.jpg

Thanks!

Romeo