This is how I got into the 10ZiG 58xxq.
If your 58xxq is fitted with a stand start by removing it. This is held by a single screw.
The cover to the USB compartment on the top of the 58xxq may be held shut by a screw.
Remove it to gain access to the compartment. It is a small cross-head screw so you'll
need a suitable screwdriver such as those that come in the sets marketed as Watchmaker
Maker's or Jeweller's Screwdrivers set.
Open up the hidden USB compartment on the top of the 58xxq. This will reveal a single
screw close to the back panel. Remove this screw. You will then be able to slide the
top cover to the rear and lift it clear.
Looking down you need to remove the screw circled in red. This will let you remove
the side cover.
The two screws circled in blue hold a small metal bridge in place that prevents the SATA DOM being removed. You only need to undo these if you want to remove the DOM.
Having removed the screw you will be able to slide the side panel back a a few mm and
then lift it clear.
With the side panel out of the way you'll see a metal panel that covers about half the
area of the circuit board. Remove the two screws after which you can remove the panel.
With the cover removed you have access to the socketed memory and also another
SATA socket.