do you mean the setup property or the attack target property? or just use_search_radar, because i enabled that for the tracking radar, search radar and the launchers just in case
I just use the unitsetproperties and check the use_search_radar there. I was testing it recently with a friend and it looks like they may have broke the s-75 launchers. Because when I tested every other launcher with the same tracker and search radar they worked fine. You can use the ussr_ai_sam_launcher_5p85se with the ussr_ai_sam_radar_snr_75 and ussr_ai_sam_radar_p_12 to get a range of ~19km. Make sure to space them out because they have a proxy fuze on the missiles of about 7m. If you want them to use their max range make sure to use the ussr_ai_sam_radar_5n63s. You can still use the p-12 radar if you’d like.