As configured,all of the SCXI channels in the 8 slots are multiplexed through Channel 0 of your DAQ device. The general form of a DAQ channel call to the SCXI is:
ob0!sc(n)!md(m)!(Channels)
where: ob0 stands for Onboard channel 0 (DAQ Dev)
sc(n) - chassis n
md(m) - module m
channels - channel string [ 0:7 or 0,2,4 or ... ]
You can perform the operation you want, however, I would suggest using MAX >>Data Neighborhood>>virtual channel. Use the Virtual channel wizard to configure two channels CH0 and CH1 where:
CH0 is referenced to Module A channel 0
CH1 is referenced to Module B channel 0