It depends. I needed to replace my Winegard PS/Splitter with wall plate and went to my catalog for a part number. Guess what I found, Winegard makes both a PS for batwings with the amp in the head and a booster for non-amplified antennas.
I've never seen a non-amplified batwing that I was aware was non-amplified and if they did sell them at one time, they don't advertise them now.
Here is my CYA statement, I have never had an RV mounted antenna that was not an amplified batwing, therefore, I can't make any personal evaluation of the booster or what it was intended for other than what Winegard says in their description in the catalogs I have on hand.
The above image shows descriptions for both. One is called a Signal Amplifier and the other is called a Power Receptacle. What I needed was the Power Receptacle for my batwing.
"I travel not to go anywhere, but to go. I travel for travel's sake. The great affair is to go". R. L. Stevenson
David Bishop
2002 Winnebago Adventurer 32V
2009 GMC Canyon
Roadmaster 5000
BrakeBuddy Classic II