New rear main seal, but still leaks.... Rubber plug? Where?

[SKIDOG74]

Some rear main oil seal failures may be caused by abrasion from dirt or contamination, which can collect on the seal. Vehicles operated in dirty or dusty conditions are most susceptible to this type of failure. A rubber plug is now being used in production to eliminate an entry point for contamination. The plug is now installed in a one inch hole in the cylinder block, directly above the starter mounting location (see illustration). The plug, P/N 53020465, is available through MOPAR and should be installed any time rear main seal service is performed. This can significantly extend rear main seal life for vehicles operated in these conditions.