The SWS do not "bolt in" - they have the right bolt pattern but are too deep, and the notch in the enclosure for the connector is left open.
EQ tells people to use hugely thick foam tape as a spacer, and never mentions the notch at all.
We supply metal rings and gasket tape, and starting last year we also include HiFi/Top HiFi wiring adapters preinstalled on the woofers and the rings.
Musicar Northwest Portland OR musicarnw.com
Musicar Certified Sound for BMW