Night Vision Anyone splice a TAPs onto a meprolight MOR cable?

[Pseudohero]

Going to splice this to connect a surefire AA vampire for a full AA IR and vis laser set up with IR and vis illumination. Shouldn't be a voltage issue as they are both run series (that statement might indicate that I don't know how these work because I don't). Is it just like a light switch which lets full power through a circuit? I do know how to splice wires and have the tools to test the circuit. I was going to use some heat shrink with silicone on the ends to fully seal. Would appreciate suggestIons for a nice clean set up.