it is entirely possible and the answer is in the midi / part setting pages.

the channel for each part should be set here, and this should match for the voice you wish to use on the other keyboard. It would be simpler to set technichord to part 4 on the technichord page. This would give you total control.

then use the local column to switch OFF the voice on the keyboard you do not wish to hear, leaving the voice on the other keyboard to be heard.

I seem to remember the 330 had a midi menu, you will need to set this accordingly to match your requirements.