RTC enabling in Jetson Nano recomputer j101 v2


I am having seed studio’s Jetson nano reComputer J101 v2.0. I want to add a battery holder to hold a battery to power the RTC. I also have a NVIDIA’s Jetson Nano 4gb. I was not able to find any schematics for seed studio’s J101 v2 variant. I was able to keep the RTC working in NVIDIA’s variant since I had access to its schematics by adding a battery for RTC and a diode.

Now, what rework should I make in seed studio’s variant in order to keep RTC working even after power off? Any rework is required in the first place? If yes, please guide me through it.