BLX ESC 185 - Broken mounting tab

Double sided tape or velcro will do the trick too

Gorilla Glue makes MOUNTING tape that will hold like 50 lbs to wall. It held my battery tray in place for months with 2 3S packs in it. Off road and big jumps, and that tray held tight. I bet it would hold the ESC for life. Be sure to do a super clean up on both surfaces, before you stick it.