If you need to pass Quote, Contract or Rebate Agreement header field values to the inline configurator logic, you can use the api.contextTypedId() method. This way, you can obtain the TypedId and further work with it (e.g., fetch a Quote).

if (api.isSyntaxCheck())
   return

def configuratorValue = cProcessor.getHelper().getRoot().getInputByName("configurator")?.value

cProcessor.addOrUpdateInput("ROOT",
		["name" : "configurator",
		"label" : "Configuration",
		"type" : "INLINECONFIGURATOR",
		"typedId" : api.contextTypedId(),
		"url" : "PromotionManagerConfigurator",
		"value" : configuratorValue]
		)

a

def typedId = api.input("typedId")

def contract = api.find("CT", Filter.equal("id", typedId?.split('\\.')[0]))[0]

//Description
def descriptionParam = ce.createParameter(InputType.STRINGUSERENTRY,"Description")
descriptionParam.setLabel("Description")
descriptionParam.setReadOnly(true)
descriptionParam.setValue(contract.get("label"))
descriptionParam.setParameterGroup("General")

//Start Date
def startDateParam = ce.createParameter(InputType.DATEUSERENTRY,"StartDate")
startDateParam.setLabel("Start Date")
startDateParam.setReadOnly(true)
startDateParam.setParameterGroup("General")
def startDate = api.input("StartDate")
if(!startDate)
	startDate = contract.get("startDate")
startDateParam.setValue(startDate)

//Upload Customers
def uploadCustomersParam = ce.createParameter(InputType.PARSABLEINPUTFILE,"UploadCustomers")
uploadCustomersParam.setTypedId(contract.typedId)
uploadCustomersParam.setLabel("Upload Customer(s)")
uploadCustomersParam.setParameterGroup("Upload Customer(s)")
def uploadCustomers = api.input("UploadCustomers")
uploadCustomersParam.setValue(uploadCustomers)