rb433 help with wireless on atheros ar5213 (900mhz) cards

Very new to these Mikrotik RB433 boards and the AR5213 900MHz card.

I am not able to get these two boxes to communicate with each other.

Near side:
-RB433 with AR5213 card
-WLAN1 interface is enabled
-WLAN1 is in pseudobridge mode
-SSID is set “xyz”, and band is set for 2.4GHz-B w/ Freq of 912Mhz (this doesn’t quite make sense to me but…)
-Security profile is setup using a PSK only

Far side:
-RB433 with AR5213 card
-WLAN1 interface is enabled
-WLAN1 interface is in ap bridge mode
-SSID is set “xyz”, and band is set for 2.4GHz-B w/ Freq of 912Mhz (this doesn’t quite make sense to me but…)
-Security profile is setup using a PSK only

Both WLAN1 interfaces are basically indentical except for the bridge modes. Yet they don’t seem to communicate with each other at all. No registrations, etc. This is in a test lab, and I do NOT have the actual 15dbi antennas installed yet, NOR do I have the little 6" pigtail connector installed. Regardless, I would think I’d get some kind of signal between these two boxes when they are sitting 12 inches away from each other.

Any idea what to look at? Have tried searching online for answers, reading documentation ,etc. I think I’m just missing something easy. ?

FWIW, I was able to get a signal once I hooked up the pigtail/ufl cables to the AR5213. I thought for testing purposes so nearby I wouldn’t need that.