what kind of batteries do i have?

rvshrinker wrote:
i am attaching a parkit360 trailer dolly to my TT and the battery hookup differs depending on whether I have 6 or 12 volt batteries. i have two of them. how do I tell?

The batteries will be wired for 12v either way. Connect same as the main RV power cables are connected and you are good to go.
Picture just above shows perfectly what I am saying.