MKA-47 quick release bracket for sale $75 local pickup or $100 TYD.
From the Minn Kota website:
MKA-47 UNIVERSAL QUICK RELEASE BRACKET | MFR #1854040
Universally designed bracket and top plate (additional top plates sold separately) allow you to easily switch between cable and electric steer motors, slide the motor inboard (up to 6"), or easily remove it for storage and security. Features corrosion-resistant anodized aluminum construction with stainless steel hardware.​
Compatible with Ultrex, Fortrex, Maxxum, Edge, Terrova, PowerDrive, PowerDrive V2, Riptide Fortrex, Riptide Maxxum, Riptide Edge, Riptide Terrova, Riptide PowerDrive, Riptide PowerDrive V2 and DeckHand 40.