I am quite new to wiring intruder alarms. I just purchased the H-well ADE Accenta 4 x PET PIR Starter Kit and have the following questions:

1. My current intruder alarm has an internal siren and a strobe both in serial connection to a PIR. Is this possible with the H-well kit or do they both have to have their own wiring?

2. According to the H-well Engineer's Manual the strobe should be connected with yellow, white, green, red and black. What about the blue?

3. I have an internal siren which is connected with 6 core cable but extension speakers should be connected with 2 wires according to Engineer's Manual. What do I do?

4. 6 core wiring in general. Does it matter which colour I choose for the different inputs as long as I connect for example the same colour for Tamp on PIR and TAMP on panel?

1. My current intruder alarm has an internal siren and a strobe both in serial connection to a PIR. Is this possible with the H-well kit or do they both have to have their own wiring?

It is possible but they should be on their own cables

2. According to the H-well Engineer's Manual the strobe should be connected with yellow, white, green, red and black. What about the blue?

If using a 5 connection bell then 1 core is spare and not used.

3. I have an internal siren which is connected with 6 core cable but extension speakers should be connected with 2 wires according to Engineer's Manual. What do I do?

That is correct speakers use 2 wires. The other cores are unused

4. 6 core wiring in general. Does it matter which colour I choose for the different inputs as long as I connect for example the same colour for Tamp on PIR and TAMP on panel?

Colour is irrelevant as long as the same connection is used.