Generally speaking they don't use enclosures or junction boxes for anything. They drill holes and if you're lucky, they'll caulk them. Keep in mind also that to be painfully correct, anything that you wish to ground to your bonding point must have a wire that runs directly from the device to the bonding point.
If it makes sense to come in through the attic, they'll often try to use a soffit vent.
Remember also that the fewer couplers you have, the better. Insertion loss can be a demon. It may not look professional to have cables hanging out of the wall, but it is the best thing you can do. What I've been doing with cables that I don't use immediately is stuffing the wire back into the wall and putting a blank outlet cover over the hole.
If it makes sense to come in through the attic, they'll often try to use a soffit vent.
Remember also that the fewer couplers you have, the better. Insertion loss can be a demon. It may not look professional to have cables hanging out of the wall, but it is the best thing you can do. What I've been doing with cables that I don't use immediately is stuffing the wire back into the wall and putting a blank outlet cover over the hole.
