1977 Elandan 2: Where is the Shore Power Hookup

[Kungfuman]

Hello everyone.  I'm very new to the RV world as I just got a 1977 Winnebago Elandan 2 for a song.  Some friends and I are going to remodel it inside and out but my first question is where is the shore power hookup spot?  I have looked everywhere inside and out and I cannot find it anywhere.  Any help would be greatly appreciated.

[Oz]

Driver side, rear, small, squarish compartment with a key lock latch, just above and before the corner of the rear bumper.