[Boatanchors] RME question

[bonddaleena at aol.com]

Hi, a bit of background.......

I have always wanted a RME 6900 Receiver. I saw my first one, many 
years ago in my late Uncle / Elmer's shack. A few years ago, I acquired 
one (of 2) 6900s and a 6901 speaker, owned by the legend, W6AM, Don 
Wallace. I sold it to finance other projects. In the interem, I have 
owned several 6900s and have a fine example in my collection. No 6901 
speaker, though.....drat.
Last week I acquired a VERY nice RME VHF 126 converter for 6M, 2m, and 
220. I haven't started to play with the 126, yet.
However, I HAVE to ask this:

What the heck are the RF input connectors??? The output is a piece of 
RG58 with a PL259. This is stock. However, I have never seen input 
connectors like these. Since I will be using the 126 for fun, I am 
going to change out those connectors. Probably to BNCs. It looks like 
this will be a 'no holes' modification.

thanks in advance!

ron
N4UE