How do you open the glass on electric/water meter ? ( u know, the one at the side of your house?)?

the glass housing broke on my water/electric meter and needs to be replaced. i don’t want to have water/power comp. to do the replacing because it will be costly.(i live so.cal) can i do this myself? and how would i go about doing this? anyone have answers that won’t involve having to call DWP?
(dept. water/power) :)

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