Air Conditioner J-Box EASY SWAP adaptor plate for -206 when used with 121411-010 J-Box, 100190-204 and -205 J-box air conditioner models are obsolete. They can be replaced by 1 off 100190-206 however 1 off J-Box mounting adaptor plate 100190-500 is required when the J-Box type is 121411-010. The 100190-500 adaptor plate is not required if the J-Box type is 121411-005.