Yes no probs, if you take the clock set out, you will see some symbols/lights that are not used, you could simply use one of these, may not be the right colour, but still a light, you will know hat it's for, trace the track on the rear of the clock set to see which one you need to tap into, the glow light wire will already be there in the connector so it would be easier to se where this one is going, maybe it is just in a different position and the bulb has blown ?
take all the bulbs out the rear of the clock and hold it up to the light to see if one ois glow plug symbol and start from there.
If all else fails could simply run a wire straight from glow plug relay.
tabetha