Using Naim Uniti as Source in a 150/112 system

 I have an older NAP150/112 amp preamp combo with a flat cap and CD5. I recently purchased as used uniti 1 to use at home while the equipment is serviced.  I have the following questions. Can I use the Uniti as a source component to the 150/112 system.  That is,  can I use the preamp out from the Uniti to go into the 112, using the Uniti CD player, streamer or Internet radio, depending what is selected on the Uniti, as the source for the old system.  Assuming that  I can do the above, can I run the systems together.  That is can I have one set of speakers driven by the Uniti and a second by the 150/112, which would play the same source if Uniti is being used as the source, or different sources if I selected something other than the Uniti on the 150/112.