RouterBoard hAP ac lite 952

Witch outside antena can i conect to routerboard board to have stronger 5 GHz signal?I must conect two ap with 5 GHz link.

There is no option to add external antenna for hAP ac lite.

I can i whether the other can be connected to the external antenna and that the 2.4 and 5 at the same time? Something like 951 or Hapac RB962UiGS-5HacT2HnT ??