Over the years many builder sites detailed this conversion, obviously you are not a builder or your homework.
all of the recent conversions done to the yugo M-76 were done comparing a M-76 mag with a M-13 mag and/or a K/G 43 mags, some minor welding is required
this is simple stuff, its not like converting m-14 mags to fit a yugo M-77 which is amateur hour
I bought my converted M-13 to G/K-43 mags from a guy at the Forks of the Delaware shows in the early 80s, I will do my own conversions for my 2 yugo M-76 rifles
oh get out of Kommifornia
mag conversions are common did you know P-226 mags are the same as Beretta 92 f mags and walther p-99/P88 mags they all share the same box mag, the difference is in the mag catch location, since checkmate 92f mags are cheap I can save my $80 P-88 mags for the range, dremel tool and files