MIDI two Alesis D4s together

[Graymalkin2001]

I'm hoping someone with a good deal more knowledge of MIDI than I can help.

I have a large electronic drum set that requires two D4 drum modules; one for drums, and the second for cymbals.
Before I expanded the set, I used only one D4, and MIDI'd out to an Alesis SR-16 drum machine to record patterns, and back to the D4 for playback using the D4's internal sounds. Worked very well.

Now, as I said, I have expanded my kit. What I'd like to do is essentially the same as the above arrangement using the SR-16, but, of course, using both D4 modules. So, the question is this:

What would be the connections and MIDI settings to connect the first D4 to the second D4, connect the SR-16 for recording patterns, and connecting the SR-16 back to the D4s for playback?

I know that, for folks well versed in MIDI, this might be child's play. For me, it's a challenge! Hence, the request for advice.

Many thanks in advance for any advice!

[SysExJohn]

Connect the MIDI out of the SR16 to the MIDI in of the 1st D4, then the MIDI thru of that to the MIdI in of the 2nd D4, a kinda daisy chain.
Make sure that the D4s are set to trigger only the drum notes on the 1st and the cymbals on the 2nd.
I believe that should work.
SysExJohn.