i drive a 520i M50 engine manual. when i opened up the ecu, it is a 2 layer board.

i have difficulty removing the upper board - i'm stuck at the stage where you need to "pry" the it away from the connector side of the wiring harness.

i have read many postings but i'm not sure where and what else is preventing the upper board from being eased out.

is there an alternative way to open the 2 boards - like opening the bottom base plate ?