TXGunNut said

Saw that, was wondering if the front hole was somehow different. Wasn’t clear on how it secured at the top rear of the receiver either.   

WHOA!  There must be TWO!  Because the Lyman catalog I just checked referred to the need for drilling “holes”!  Locations were unspecified, so I still can’t visualize where the second one would be, and don’t feel like digging out mine (absolute back of the safe) to find out.