This is purchase option. Here is the wording from my contract:
15. Purchase Option
You have the option to purchase this Vehicle “AS IS” from the originating dealer, or other
location we specify, in cash for the Purchase Option Price, plus any official fees and taxes,
vehicle inspection costs required in connection with the purchase, and a Purchase Option Fee
of $300.00, which fees, taxes and costs are not included in the Purchase Option Price agreed
to in Section 6. If you purchase the Vehicle at the end of the lease term, the Purchase Option
Price will be the Residual Value shown in Section 5.d). If you purchase the Vehicle before the
end of the lease term, the Purchase Option Price will be the Adjusted Lease Balance disclosed
in Section 14). In either case, you must also pay other amounts due under this Lease at the
time of purchase.