Help with Solar Design for Circuit

[Dicko]

Hello folks,
I have a battery powered application that will sit outside. The battery is a 3.7V LiPo, 3700mAh with a discharge current of about 128uA. I want to use a solar panel to recharge the battery in sunny conditions. I was thinking of using this panel, and LiPo charger. Just wondering how to connect them.

I was thinking of connecting the battery to the battery I input. Then Vout to a pair a wires connected to a jst connector which will go into the jst port of the Arduino. The Vin I will connect to a solar panel.

https://cpc.farnell.com/seeed-studio/313070004/solar-panel-55x70-0-5w/dp/MK00380?mckv=s_dm%7Cpcrid%7C224646539664%7Ckword%7C%7Cmatch%7C%7Cplid%7C%7Cslid%7C%7Cproduct%7CMK00380%7Cpgrid%7C49734053271%7Cptaid%7Cpla-1212017578951%7C&CMP=KNC-GUK-CPC-SHOPPING-945765023-49734053271-MK00380&s_kwcid=AL!5616!3!224646539664!!!network%7D!1212017578951!&gclid=CjwKCAiAuOieBhAIEiwAgjCvcqJiOXxSJGhAlo1UY4-MR3G8UcDlMZAzP-dM2aMXGJ2bOGe7YSHDoBoC2ygQAvD_BwE

https://uk.farnell.com/dfrobot/dfr0264/solar-lipo-charger-3-7v/dp/3769969?ost=3769969

The device it is powering is the Arduino WAN 1310

https://docs.arduino.cc/hardware/mkr-wan-1310

[m k]

Panel -> charger -> load.
It's that simple.

Your charger is also charging much more, so minimal extra load is not a problem.