ste92ve. the hole on the white piece is not to prevent the thing from going too far down, as you can see the 4 circles on the square part itself actually sticks out once again, so that doesnt make sense.
i did this mod already, i can tell u that the hole is there for the LED light to go thru to the translucent marking on the button. The hole goes around a small LED and allows the button image to be illuminated. the contacts on the circuit board still get pushed down all the way by the circular protrusions.
'06 bsm e90 330xi : 18" VMR CSL : KW V3 : GruppeM Rep Intake : UUC/Corsa Catback : Hartge Lip : ACS Roof Spoiler
OEM CF Trunk Spoiler : CF Emblems. Pillars. Mirror. Grille : LUXER12 led plate : V1 Hardwired : OG.longtran e90post sticker! circa 2005