Remapping the 🔎 keyboard key to CTRL

In a similar vein to the question here: Android keyboard and remapping the CTRL key

I am using JuiceSSH and External Keyboard Helper Pro.

I have another Bluetooth keyboard that I was successfully able to remap capslock to control, but my folding keyboard case for my nexus 9 has this nifty search button that I can't remap.

Has anyone been able to do this?