2x Allen key bolts - it literally undoes - the old ecu then needs disconnecting
Push tab in - the pull lever (it pulls it out for you)
Swap ECU's
Drop connectors on - lever pulls it in for you - ensure tab locks to ensure no false detachment
Bolt down
Dont go made tightening them, its Alu Throttle body, just stop when its tight - and small nip shud suffice
Ziggy