In the backoffice, go to management--Department Settings--Apparatuses
On the follow-up apparatus page, click new.
This will open a pop up where you must enter the Apparatus ID for this vehicle.
Once you have entered the info click "Submit"
Then you will get into the Apparatus detail page.
In this page is where you can enter the important info regarding this vehicle.
The highlighted fields in the top half are the most common if this vehicle will be involved in incidents and inventory. The bottom two rows is where you are able to the Maintenance and Inventory check scheduling.