This is my first post

However their is 2 LCD screens on the dashboard that are after market add on's - they turn on with a switch under the dash when flicked. They look to be temperature sensors but I'm unsure for which.
The left one stays around 18-28
Right one raises up to around 80-88
I think the right one is the engine temp ? as it would make sense as its something getting hotter as we drive.
The left one starts at around 25-30 esp on a hot day and slowly lowers to around 18-22 when driving.
Anyone seen these before or know what they are? I have 0 knowledge on cars/vans so im learning as i go - i have't yet been able to figure out where the wires go and my wife doesn't really want me to start playing case i break it

Let me know if this is in the wrong place for future posts.
Thanks