E120 Raymarine antenna issue

[C Skip R]

Lately I have noticed when I turn on my 2 E120s I don't get the ships position for several minutes. These units are approx. 7 yrs old. I was informed it is probably the Raystar RS125 antenna going bad. Checked the little blinking light and it is amber which indicates its probably going bad. Okay decide to order one and find out RM doesn't make that one anymore. The new one is a RS 130 GPS antenna so I'm going to order it.
Does anyone know if the new antenna will fit using the existing cable or will I have heartache and pain and have to pull a new one. Nothing is ever easy on a boat.