Two computers at once. MIDI Connections: MRCC, SSP, & Ableton. USB how to do so?

[Kent]

Problem: How to connect the SSP & my MacBook Pro to the MRCC via USB for MIDI purposes? Basically, 2 computers at once for MIDI.



As can be seen in the above photo, there are 4 HOST USB ports and 1 DEVICE USB port.

The SSP has:



(2)
1 high speed USB host port (leftmost port) with USB ethernet adapter support. (see below for the wiki update)
1 full speed USB host port (middle port) with USB MIDI keyboard support.
(3)
1 USB device port (rightmost port) with USB Audio Class 2.0 support (supports recording into your Mac/PC).

When I play out live, I won't have Ableton/laptop with me. However, in the studio, I'd like both the SSP and the laptop connected, for MIDI, at the same time.
I do not want Ableton to route MIDI to the SSP in the studio as I want to create a single master preset for both studio and live use wherein I can just leave the laptop at home and head out with the SSP and not be forced into establishing 2 workflows.

I'd like to use the SSP's USB port 3 (the DEVICE port) for audio I/O to the laptop when in the studio.

Is there a way to connect the SSP and the laptop to the MRCC, via USB only?
I don't want another USB to DIN device in the chain, if possible.

I only use my MachineDrum (on MRCC port 2 [DIN])  and Ableton as clock masters.
I do use 2 different MIDI controllers with this system but neither generate clock.

[According to this Technobear wiki, both the left and middle USB port of the SSP can be used for networking. I'm not sure if that allows for extra flexibility in solving my quandry.](https://github.com/TheTechnobear/SSP/wik...ort-usages)
Putting it in here just in case it is useful.

Any ideas as to how to connect both the SSP and the MacBook Pro to the MRCC via USB only?

Thanks!