Rear hand brake position can be retracted manually using a 9v battery directly on the motor, I find it to be the easiest and fastest method.
Just did it this way on my M340i to install some Porterfield R4-S
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Fun/HPDE: 2023 M3 6MT Individual Malachite
Past:2023 M4 CSL, 2022 M4C Vert, 2020 M340i, 2018 M2, 2015 M235i, 2008 135i 550whp
Daily: 2023 X5 45e
Daily/Family: 2021 Atlas Cross Sport 3.6
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