HP J3188A Installation And Reference Manual page 16

Installing the Hub
Installing and Configuring Your Hub
Table Mounting
To place the hub on a table or other horizontal surface, no special tools are
necessary. Apply the four feet included in the accessory kit onto the bottom
of the hub. Be certain to pick a sturdy table in an uncluttered area. You may
want to secure the hub's cables to the leg of the table to prevent people from
tripping over them.
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