Huawei Ec321 And External Antenna

[phil 0]

Hi,

I found this in the Huawei Data Card manual. (see picture attached)

The EC321's antenna is shown as "Detachable".

But I don't see how to remove it ! Can somebody give me some indications ?

I want to put an external antenna like this :

http://cgi.ebay.co.uk/High-Gain-3G-Directi...7QQcmdZViewItem

It is to improve the signal.

Thanks.