Literally : Services Work Order Contract
Which is ok or
Work Order Contract
but usually they use short term for this type of contract called "work order" . There are two types of word order ; 1-service order 2- job order.
In this context it is "service order"
Finally : service order (is very enough)

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Note added at 1 hr (2023-01-23 09:29:32 GMT)
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In Arabic English style: (this term is mine ) it can be written :
"Work Order for Services"


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Note added at 1 hr (2023-01-23 09:33:33 GMT)
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Which means :
service work order
but in short :
work order / service order

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Note added at 1 hr (2023-01-23 09:34:48 GMT)
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service order agreement :

https://www.lawinsider.com › dictionary › service-order-agreement
Service Order Agreement Definition | Law Insider
Service Order Agreement. (" SOA "): That part of an Agreement that is executed by the Company and the Customer and, among other things, identifies the Service to be furnished and the location (s) at which that Service is to be provided. Sample 1 Based on 1 documents Save Copy Service Order Agreement.

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Note added at 1 hr (2023-01-23 09:36:41 GMT)
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Services Work Order Contract:

https://mn.gov › admin › assets › 22AMN Work Order Contract_tcm36-536387.docx
Term of Contract - mn.gov
Services Work Order Contract. SWIFT Contract Number: Master Contract T-Number: 22AMN. This Work Order Contract is between the State of Minnesota, acting through its Example: "Commissioner of [insert name of agency or board]" or "Director of [insert name]" ("State") and [Contractor] whose designated business address is [Contractor .

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Note added at 1 hr (2023-01-23 09:38:11 GMT)
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Work Order Contract

https://www.lawinsider.com › dictionary › work-order-contract
Work Order Contract Definition | Law Insider
Work Order Contract means the Contract entered into between ODOT and the Consultant for the services as required by the Project. Work Order Contract is also refers to WOC number 4 under Price Agreement B33840 ("Contract") for the services provided for in Exhibit A. Work Order Contract means a contract formed pursuant to clause 4.2 (a).

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Note added at 1 hr (2023-01-23 09:47:23 GMT)
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or : Service Contract with Service Order

https://answers.sap.com › questions › 11305436 › service-contract-with-service-order.html
Service Contract with Service Order | SAP Community
We are into maintenance and manpower supply business. We were having a long term maintenance and manpower supply contracts with our customers. Once contract is signed with customer say for 5 M USD for 5 yrs, based on requirement customer release a service order to our company.

So,
work order contract
is enough but I prefer
service contract .