hello guys just doing project and this need your help we want to know the exact name and model etc. for this ipex connector not sure pls help thanks and god bless

Those are not connectors and you can't add external antenna.

thank you sir nomis, is there other way to do this, where just plannig to add 8dbi antenna sir..

You need to select a device that has better antennas, instread of trying to add antennas to a home router.

For example Groove, Metal, Netmetal, mANTBOX15 or such devices.

as per my research i have found this, same as what we plan. what can you say about this sir. for now we are developing product using haplite,rb951ui and rb951G. since the unit is inside the box thats why we decide to add antenna instead of buying metal2 etc.
https://weblance.com.ua/192-mikrotik-rb ... tenny.html

Instead of trying to hack an indoor device, please use appropriate device, we have a lot of other products available, like I said above.