How to connect metamask to Polygon?
Click import wallet if you have an existing wallet.
Setup your password and secret recovery phrase somewhere safe.

Setup MetaMask to connect to OEC Mainnet

Switch the connected blockchain by clicking on the tab saying Main Ethereum Network, we need to add the OEC network.
Scroll down until you find Custom RPC.
Enter in the OEC mainnet details as follows:
Click Save.
You have now connected to the Polygon mainnet with your Metamask Wallet.