In larger setups it makes sense to distribute your Debian/Ubuntu machines' wireless networks configuration via Puppet or other configuration management utilities. What you probably try to do first is to attempt find already wireless network configuration file on your laptop ant try to distribute that. NetworkManager places all it's configurations under /etc/NetworkManager/system-connections directory. My initial network configuration in /etc/NetworkManager/system-connections/bootcamp looked like this:

[connection]
id=bootcamp
uuid=35e9aca5-27fb-495b-b230-acb5eac840ba
type=802-11-wireless
permissions=user:lauri:;

[802-11-wireless]
ssid=bootcamp
mode=infrastructure
security=802-11-wireless-security

[802-11-wireless-security]
key-mgmt=wpa-psk
auth-alg=open
psk-flags=1

[ipv4]
method=auto

[ipv6]
method=auto
ip6-privacy=2

Note that /etc/NetworkManager/system-connections and it's files are accessible only by root and that's the way it should remain. You notice that there is permissions=user:lauri:; this means this particular connection is owned by user named lauri and not available for other users. To make the connection available for all users on the system remove that line.

There is also psk-flags=1 which means that NetworkManager won't store the secret (WPA2 pre-shared key) for this wireless network. Instead that task is delegated to the nm-applet which in turn uses GNOME keyring daemon to fetch the secrets from user's wallet. This way the secrets are stored in the user's home directory in an encrypted fashion assuming the uses sets the passphrase for his wallet properly. To store the secret in the NetworkManager configuration you need to add psk=secret to the configuration AND remove the psk-flags=1 line.

My final configuration which I am distributing from my Puppet looks like this:

[connection]
id=bootcamp
uuid=35e9aca5-27fb-495b-b230-acb5eac840ba
type=802-11-wireless

[802-11-wireless]
ssid=bootcamp
mode=infrastructure
security=802-11-wireless-security

[802-11-wireless-security]
key-mgmt=wpa-psk
auth-alg=open
psk=salakala

[ipv4]
method=auto

[ipv6]
method=auto
ip6-privacy=2

The configuration in Puppet looks also pretty straightforward:

file { "/etc/NetworkManager/system-connections":
    ensure => directory,
    recurse => true,
    mode => 700,
    owner => root,
    group => root,
    source => "puppet:///modules/lauri-koodur/koodur-workstation/etc/NetworkManager/system-connections"
}

Of course you might find Puppet modules which would achieve similar purpose, however I didn't find any which have clear configuration options for system-wide connections.