As can be seen in the images below, some towbar fitting kits come with a bolt/bolts tack welded to a length of wire. The wire is to allow the positioning of the the bolt into the required space when access into that space is too small or awkward. Using the wire the bolt can be easily moved into position and then tightened as per instructions.
To use the wire tacked bolt, straighten the wire (take care not to break the wire) so that it can be manipulated along the chassis runner/enclosed opening, enabling the bolt to be located through the correct hole. Once inserted in the hole tighten as per instructions.
Image 1 shows the straightened wire during towbar fitment. Image 2 shows an example of how the wire tacked bolt comes in the kit and how it should be straightened out ready for installation.

Towbars Australia demonstrates how to cut a bumper when installing a towbar:
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If I purchase a Towbar for my 2004 Falcon will it fit a 2009 model when I update?
Yes the same Towbar fits either as long as they are the same body types etc.
Am I able to fit the Towbar myself?
Yes you or a local installer can fit the D.I.Y kit as all parts are supplied. We also offer 24/7 email or phone support for any installation questions or information.
Are your Towbars built to Australian design rules?
Yes all of the Towbar kits we supply are built and tested to suit all Australian Design Rules (ADR).
Do you sell Hayman Reese Towbars?
Yes we distribute for a number of Towbar manufactures including Hayman Reese.
If I want a particular brand of Towbar can you source it for me in kit form?
Yes we can put together a kit to suit your needs and budget.
Are all your kits sent complete or can I buy just a wiring harness?
All of our kits are sent complete and ready to install, however we can supply any individual item to suit your car or needs.
If I buy one of your towbars how long will it take to get here?
We are located in Queensland and delivery to all states is very quick , within 2 to 3 days and Perth and Tasmania about 5 working days.
Will fitting your Towbar kit void my new car warranty?
No all of our kits are made to suit each car and will not interfere will your new car warranty.
Why is your kit about half the cost of a Genuine Towbar kit?
Our kits are made for the automotive aftermarket and carry a lifetime Warranty like all Genuine Towbars, they are made to suit the vehicle they are designed for and are equal in quality and load carrying to that of a genuine item , we find that in most cases we are more economical because you are not paying for the genuine name or sticker.