Replacement of the handle assembly of your Metallic Series rower is fairly straightforward and the process is identical for any Metallic Series rower.
As a guide, watch the video below. Note that this video is for an Original Series rower, but the same concepts apply for the Metallic Series from a procedural standpoint.

Step 1
Place handle into the most forward position near the large pulley in the Forward Riser.

Step 2
Using the 5mm ratchet included with your rower, remove the handle rests and handle rest bolts. Set them aside.

Step 3
Rotate the footboard away from the tank assembly toward the rear of the rower.

Step 4
Remove the tank cover by sliding it simultaneously upward and toward the rear of the rower.

Step 5
Unclip the bungee cord from the recoil strap.

Step 6
Slowly pull the handle so that its strap unwinds from the clutch housing. Do this gently as pulling too fast will cause the recoil belt to wind up too much.
Once you reach the end, unscrew the bolt holding the handle strap to the clutch housing with an 1/8” Allen key.

Step 7
Orient the handle so that the rivets in the handle collar (where the handle attaches to its strap) are facing downward.

While preserving this orientation and not twisting the handle strap, feed the handle strap through the forward riser cap, around around the large pulley in the forward riser, and into the clutch mechanism area as shown.

Step 8
Guide the handle strap inside of the upper guide pulley

Then, thread the handle strap through the openings in the clutch.

And finally, secure the handle to the clutch by tightening the small bolt with the 1/8″ Allen key.

Step 9
Gently pull on the recoil belt to wind the handle around the clutch.

While doing so, hold the handle strap taught to prevent it from slipping off the pulleys.

The handle must reach its most forward position, up against the Forward Riser.

Step 10
Pass the recoil belt over both guide pulleys (the smaller ones) in the Forward Riser. Ensure the recoil belt is aligned and sits in the grooves of both pulleys.

Step 11
Re-connect the bungee cord to the recoil belt.

Step 12
Reinstall the tank cover by sliding it simultaneously downward and toward the front of the rower. If your rower is equipped with black plastic shims to secure the front end of the top cover, ensure the cover is fully seated in them.

Step 13
Rotate the footboard forward towards the tank and align the handle rest holes with the nuts embedded in the black angled brackets of the tank assembly.

Step 14
Using the 5mm ratchet, reinstall the handle rests and their bolts.
Do not overtighten these bolts as damage to the black angled brackets may occur.
Note: Do NOT use a drill or impact driver when when installing these bolts.