Stick the Velcro to the top right panel of the Keystation (above the pitch bend). Mount the Proteus there. Run a short MIDI cable from the Keystation Out to the Proteus In. Plug the power bank into the MyVolts cable, then into the Proteus.
Kurzweil often provides software updates for their keyboards, enhancing features, adding new sounds, or improving performance. Users can check the Kurzweil website for updates specific to the Proteus Portable 88. proteus portable 88 2021
The provided topic "Proteus Portable 88 2021" likely refers to a portable version of Proteus Design Suite 8.8 Stick the Velcro to the top right panel