Unfortunately, it won't work in TTL. The OM10 doesn't have the necessary circuitry nor the extra pin for it.
The OM40 is the only 2 digit amateur to have flash TTL.
I'm sure you are confusing with the ADI system on the 10, basically the same as the -2 series: i.e. TTL with real time measure while exposing the film.
The 10 also has the same pattern of white dots on the first curtain to help the ADI system, It is only used by the Auto aperture priority system for ambient daylight, not for flash.
See page 2 of the manual you linked to for the flash chart with different OMs.