Interesting question. After studying the detailed pictures for a while, I came to the conclusion that this is not possible, at least not locked. The Victron connector is a good deal longer than the CTEK connector. I don't mean the split part with the two poles of the plug, but the part underneath up to the seal. The CTEK plug is about 1mm high, the Victron plug is probably 5mm. This means that there is probably electrical contact, but the plug does not engage.

Unfortunately, the supplier could not answer this for us.