I finally got all of the parts I needed to install the probe power connectors on my 2465BCT. This is Option 11, but is not available from the factory for a BCT because there aren't enough allocated connector locations. Previously, I installed Option 1E, but is just removing a resistor and adding a capacitor on the CTT board (I also added a 50 ohm resistor for proper termination which Tektronix (intentionally) omitted). I found two locations that would work, and drilled the holes for the connectors while I had the board out of the chassis. The cable routing for the top connector wasn't a problem. For the bottom connector, I slightly enlarged an existing hole in the chassis (the hole was due to how the metal was folded).
The bottom connector would have been too close to the main board. So, I took a 1/2 OD, 3/8 ID steel bushing, and cut off appropriate lengths from each end (so that one end of the resulting standoff washer was rounded and the other flat). That also moved the top of the connectors to near the surface of the plastic.
I also had to make two small nibbles on the edge of the plastic shield. One at the top for the edge of the washer & nut for the top connector and one at the bottom for routing the bottom cable. If I had placed the top hole just a fraction of an inch (0.05, perhaps) to the left I could have avoided the nibble at the top.
Unfortunately, I did not have my drill press and the need to measure the placement of the holes in the plastic extremely accurately resulted in some raggedness of the holes in the plastic - and one drill mishap that nicked the nearby plastic. Still, not too bad.
One parts gotcha is that the maximum wire size for the LEMO type connector (actually, I used a knock-off from China - a good bit cheaper) is 26 ga stranded or 24 ga solid. The only two wire sizes for the header were 22 ga and 24 ga. That meant that I had to use 24 ga, solid. Of all the wire I have sitting around, that was not one of the sizes. I had to make an extra DigiKey order to get 2$ of wire.
Here are the pictures for the modification.
Probe Power Parts
Top Probe Power Connector
Bottom Probe Power Connector
Top Probe Power Connector in Case
Bottom Probe Power Connector in Case
Top Probe Power Shield Nibble
Bottom Probe Power Shield Nibble
Probe Power Headers 1
Probe Power Headers 2
Probe Power Routing 1
Probe Power Routing 2
Bottom Probe Power Routing 1
Bottom Probe Power Routing 2