door poppers

[lews123]

could someone please give me some advice on how to fit these door poppers i alredy have them jus unsure on fitting them
http://cgi.ebay.co.uk/Falcon-Electric-Boot-Release-Door-Popper-NEW_W0QQitemZ270175740935QQihZ017QQcategoryZ75329Q QssPageNameZWDVWQQrdZ1QQcmdZViewItem

[lews123]

anyone