EXS 24 Logic Sampler Users Group

Further to my request for help earlier. I have been checking past mails and
found one talking of setting the modwheel to EXS volume. I understand what i
have read but do not know where the "Physical Input Object"is nor the
"Recording and Thru" object. Also, how can I establish what the midi numbers
of each parameter are. There must be hundreds & I want to assign plugin
controller data to the modwheel. Please someone enlighten me.
Cheers
Lee