Components can be fitted on the rear doors. But you need a rather good installer if there is no provision in the doors. The tweeter is usually placed on the B Pillar if there is no stock location for the tweeters near the door openers.
Get the install done from a competent guy/place. Ensure that original wires are not cut. Also, use proper, good quality wires and connectors.
Get the install done from a competent guy/place. Ensure that original wires are not cut. Also, use proper, good quality wires and connectors.