MWO ORD G740-W7 is the addition of the Seals under the front Hub Caps, 804821 is the part Number and they are an O-Ring that fits over the groove on the Front Drive Flanges and seals the Front Hub Cap. This originated on 15 July, 1953 and was done if and when the Jeep visited a support unit. Those holes you are seeing are the 1/2" threaded holes for the bolts that secure the Differential Bearing Caps to the Axle Housing. Thy are normally sealed with a liquid thread sealer such as Permatex #3 to prevent the gear oil from seepage.
PROUD 2011 MVPA PIONEER AWARDEE-HONOR GRAD WHEELED VEHICLE MECHANIC SCHOOL 1960- US ARMY ORDNANCE SCHOOL(MACHINIST) APG 1962 - O-1 BIRD DOG CREWCHIEF - 68 NONSTOP BY THE BOOK ARMY TRUCK-JEEP YEARS LIFETIME AM LEGION DAV 40/8- MVPA 1064 -7 TURNKEY MV'S