Drill a 10mm hole into the tank, then screw in an aircompressor fitting with an integrated seal like this one: https://www.amazon.de/dp/B093BJBKG4
You have now converted your manual pump-sprayer into an automatic one.
Holder uses 3 M3x12 screws + 3 M3x5.7mm heat inserts to attach the cage to the ring.
The author remixed this model.
Remix of the original to make it compatible with the non-Plus version of the IK Foam Pro 2.