Has anyone installed an Intermountain mother board in one of their dc cab forwards? One of my friends received the parts from Intermountain to convert from dcc to loksound. There was no documentation included. Most of the wiring was straight forward. However, it is unclear where to solder the speaker wires.. And here is the kicker.. Intermountain hasn't answered for requests for this info.. and asking a question on their FB page is a joke.. Bueller?  Bueller?  So...any correct answer as to where to attach the speaker wires?  Thanks in advance..