I have never disc assembled a hydro disc brake before. They are Shimano deore/ slx. I want to use the cable and ends from the deore and switch them to the slx lever and caliper. Quick Google suggested there was two rubber o rings?
I assume both ends just unscrew?
I think you're talking about the banjo fitting at the caliper end, reusing the two o rings should be fine if they look OK, reusing olives at the other end is not officially right but generally works fine in practice.
I have never disc assembled a hydro disc brake before. They are Shimano deore/ slx. I want to use the cable and ends from the deore and switch them to the slx lever and caliper. Quick Google suggested there was two rubber o rings?
I assume both ends just unscrew?