I found some electrum wallet backups on a usb stick I found,I loaded them into electrum and it asks for the password,I am sure there is nothing in them there from 7-8 years ago but want to check to be sure.

I just want to see a balance,if there is anything worth while in them then I can worry about finding my old password,I used the same password but with different numbers at the end so it is do-able but I don't want to start this process unless I know there is some btc in there.

Can I do this,see the balance of the backup somehow,I don't know the seed or the wallet number but can figure out the password if there something there,I know with unknown btc wallet backup's you load them into qt and can see the wallet number and balance but I can't seen to figure out how to do this with the electrum backup.