If your glow plug is hard to reach you can install a remote glow fixture on to which you can connect your glow driver whether its one hooked to your power panel or not. Check out, for instance, Sullivan products since they have a remote glow fixture in their product line. In my newest plane the engine is inverted and totally enclosed by the cowl making such a fixture a required item. Even though its beyond the scope of your questions, also note that with an inverted engine the height of the fuel tank is more critical for good engine operation, and also to avoid siphoning, than would otherwise be the case.