sweet. vauxhall zafira/astra pumps look exactly the same as yours and are readily available on ebay.co.uk. a quick search and the wiring is as follows:
red - battery +12V
brown - ground
black - ignition +12V (i.e., only runs when key is on)
blue/white - alternator dash light (to turn it off if the key is on but car not running)
brown/white - not required (for diagnostics)
the oem vauxhall bracket looks like it could be repurposed pretty easy for frunk-mount. looks like you used -AN fittings on the return, so just one custom hose for the pressure side and done. thanks.
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