Rover 20/40 battery settings

Hi I'm new to the Renogy Rover 20/40 and just want to ask the setting type for the new batteries with my Rover 20/40 please.

The battery type is YUASA UHX50-12 and I have 2 of them connected for 12V supply. 
The battery specs says they are VRLA - AGM but after reading the Rover manual and searching the renogy site I can't get a clear answer.  

The manual V1.5 doesn't say anything about battery type selection and the unit has teh following possible settings which I stumbled into:

* Use (assume this means USER defined)
* LI (assume this means Lithium)
* Gel
* SLD
and
* FLD

So I know it's gotta be set on one of the last 3 types.
 

please use the new forum renogy.boards.net/ post under general discussion

Valve regulated lead acid is SEALED or SLD, Same as AGM