map lookup fields two modules

map lookup fields two modules

Hi everyone!
I have 2 custom modules "Contenedores" and "incidencias", Both modules contain the field "Cliente" and it is a lookup to "Accounts" module.
I have maped some fields with no problem from "contenedores" to "incidencias", but when I try to map the field "Cliente" (it is lookup fields) it doesnt work.

Can you help me?? 

void Untitled_Function55 (int incidenciaID,  string email,  string refCliente,  string Terminal,  string Cliente )

respUpdate = zoho.crm.updateRecord("CustomModule4",input.incidenciaID.toString(),{ "Email" : input.email, "Ref Cliente" : input.refCliente, ("Terminal") : input.Terminal, "Clientes" : input.Cliente });