Yup hard to hold w one hand Thats why i speak thru the video to help people outthere

Same question for me. Black wire my old one said L

Here they dont use Blk wire at all Must follow the Letter Configuration is best take Pics before and after. We do not use Black wires here unless is from Actuator These are Water Source Heat Pumps on Beach Condominiuns

probably where my orange one goes