I just bought a Herpstat 1 Basic, but I am used to the old original Herpstats. On this new one, there is only one outlet on the back of it, where the old one had an extension cord coming out of it with 3 plugs. My question is, with this new one, how do I plug in multiple plugs to the Herpstat? I use all the same size heat tape but have 2 strings of it to plug in. Thanks for the advice, unfortunately the manual didn't help...