Is there a place to plug in a Azden 51XT - UHF Plug-In Transmitter into the priest?
To the best of my knowledge, priests don't come with either XLR or mini-plug connectors! X-D
I agree with the above post, except I would like to make clear that all main speaking characters (priest, groom, bride & father-of-bride) need to be properly mic'd with a lav. The bride is covered by the groom's lav if you connect it low enough to be equal distance from both of their lips.
To plug into the sound system typically requires adding some resistance to the circuit. I use a Beachtek adapter which has a special connector for that purpose - yet I've learned to never rely on house sound.
Echo's and other sound problems will be minimized if you accentuate the speaker's lav and turn down the other sound channels. I typically work with five audio channels during a wedding edit.