M3 front bumper and block heater extension cord

[2lehelix]

I'm having an M3 front bumper put on my 97 328i over the next few days and was wondering...where do most people have their extension plug for their block heater exiting the front of the vehicle? Either the dealer or original owner of my vehicle had pried some of the front slats on the stock bumper apart to feed the plug through, which did not look too good at all.

So can anyone with an M3 front bumper on their vehicle tell me where they access cord from.

Thanks.

HS