Will incar kit for T28/T29S suit K750i?

Hi

first time poster, long time reader

My old faithful T29S recently stopped working, so I upgraded to a K750i. I do a lot of country driving and I'd always had the hi-gain in car hands free kit for my old T29S, and it included the massive black aerial outside.

My question is this:-

If I purchase the HCH-61 craddle for my new K750i, will the connection part match up to what I call the "interface box" of the old hands free system?

The old "interface box" has the following numbers on it

TYPE:- 5020025
S/N:- 03954321
KRY:- 105 107 R4A

If this won't match up, am I up for a whole new kit?

Any help would be greatly appreciated

Many thanks in advance