I am surprised that this is not the POCO's responsibility, since their service drop is connected directly to it.
In any case, I certainly would not do this work on a live wire, so take the advice and get POCO to do temporary disconnect at the pole. It will also be a lot easier to make your connection to the bracket if the wire isn't taught.
When fixing the bracket to the house, be sure that the underlying wood/alum, etc is not damaged. You may need to re-position it slightly.
FW
In any case, I certainly would not do this work on a live wire, so take the advice and get POCO to do temporary disconnect at the pole. It will also be a lot easier to make your connection to the bracket if the wire isn't taught.
When fixing the bracket to the house, be sure that the underlying wood/alum, etc is not damaged. You may need to re-position it slightly.
FW