I had access to both of Rutherford's books and photocopied the relevant pages.
In lieu of my not having any personal webspace, I'll just type out the key paragraphs.
Light:Book 1 parts of pg.145-6
The word "Abaddon" is derived from the Hebrewn term abad, and is applied to Jehovah, who is the One that is "able to save and to destroy". Jehovah destroys them that hate him. (Deut.7: 10) Many Scripture texts apply this Hebrew word to Jehovah relative to destruction. For example: "I will destroy thee, 0 covering cherub." (Ezek. 28:16) "Shall I not in that day [day of the Lord], saith the Lord, even destroy [Hebrew, abad] the wise men out of Edom, and understanding out of the mount of Esau [Satan's organization]?" (Obad.8) To the same effect it is written: "And it shall come to pass in that day, saith the Lord, that I will cut off thy horses out of the midst of thee, and I will destroy thy chariots."-Mic.5:10.
The Greek word Apollyon, which the Revelator applies here, means "destroying one", and is applied many times in the Scriptures to Jehovah, 'Who is called the destroying One. (Matt. 10:28; 21:41;Jude 5) If there could be any doubt about this, James settles it when he writes: "There is one lawgiver; who is able to save and to destroy [Greek, apollymi]: who art thou that judgest another'" (Jas. 4:12) The overwhelming Scriptural authority, in both the Old and the New Testament, applies these titles to Jehovah. Christ Jesus being the chief executive officer of Jehovah, to whom is committed all power in heaven and earth, and being authorized to, act as Jehovah's officer to destroy, the titles Abaddon and Apollyon therefore properly apply to him.' (Num: 24: 17-19; Mark 1:24; Luke 4: 34) The only reasonable conclusion, therefore, is that Jesus, the glorified King armed for war and having the key to the bottomless pit, is the "king" over the "locusts".
Vindication:Book 2 pg 186
Christ and his army will strike terror to the heart of Egypt and Satan, and his organization shall fall. (Isa. 9:6 ; Zech.10:5) Jehovah shows himself in the capacity of a destroyer to his enemies; Abaddon, the mighty One over the army of destruction, is He. (Rev. 9:11) The disturbers and polluters of mankind will be destroyed and, as it is written: "[Thou] shouldest destroy them which destroy the earth." (Rev. 11: 18) The hoofs of Satan's war organization shall never again tread down the people. Armageddon will put an end to all militarism.