Install looks fine and it is tight back there. No hose for that is included in any kit as it is not necessary - if they used the coolant or other hoses in the kit, they should not have as you need higher pressure hose (those marked gas are for low pressure systems and are insufficient for use on an injected system) And had they attached the stock fitting back to the block where it came from, there would be less stress on the connection. What markings make you think it came in the kit as I have also never seen red hose in any of the kits?