a method and components for adapting a standard rectangular or other pre - existing junction box for mounting within cylindrical concrete piers and other curved structures commonly employed for supporting light poles and other mechanisms wherein the front wall portion of the adapted junction box and the face plate member associated therewith for controlling access to the interior portion of the junction box are both shaped and configured to conform to the specific curvature associated with the outer surface of the curved structure into which the adapted junction box will be mounted . the present components enable the adapted junction box to be completely embedded within the curved structure such that the exposed front wall portion thereof including the face plate member lie substantially flush with the outer surface of the curved retaining structure . although a generally rectangularly shaped junction box can be easily adapted for substantially flush mounting within a curved structure , the present adapter components will likewise work equally as well with other junction box configurations including junction boxes having a curved front wall portion already associated therewith to produce an overall assembly having a front wall portion that is compatible with the curvature of the outer surface of the particular curved structure into which it will be encased . the present adaptation allows more convenient access to the interior portion of the junction box and provides a more weatherproof and tamperproof junction box as compared to the known square or rectangularly shaped junction boxes which are often times used in curved structure applications .