original: initially the units were coupled cab-to-cab but it was found more practical to couple master nose to slave cab .
simplifications: originally , the units were coupled cab-to-cab but it was found more useful to couple master nose to slave cab . at first , the units were connected cab-to-cab but it was discovered to be more practical to connect them master nose to slave cab . at first the units were attached cab-to-cab but it was found more important to couple master nose to slave cab . at first , units were coupled cab-to-cab but it made more sense to couple master nose to slave cab . at first the units were attached cab-to-cab , but it was found to be more practical to attach master nose to slave cab . at first they were coupled cab-to-cab , but master nose to slave cab was more practical . initially the units were coupled cab-to-cab , it was found more practical to couple master nose to slave cab . at first the parts were assembles cab-to-cab but it was found more sensible to combine master nose to slave cab .